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Ⅰ IntroductionYou can image this case: If you drive an older vehicle, chances are you don't have Bluetooth. If you don't want to remove your factory stereo to install an aftermarket Bluetooth stereo, a Bluetooth amp is ideal. Not only will you be able to add Bluetooth to your vehicle, but you will also be able to amplify your speakers and improve overall system performance.CatalogⅠ IntroductionⅡ Bluetooth Amplifier Related  Video:Ⅲ What Is A Bluetooth Amplifier?Ⅳ What Is Bluetooth?Ⅴ Why You Need a Bluetooth AmplifierⅥ Common ApplicationsⅦ How Bluetooth Amplifiers Works？Ⅷ Three Things You Need to ConsiderⅨ Recomendation  Bluetooth Amplifiers9.1 Sony STRDH190 2-CH Stereo Bluetooth Audio Amplifier9.2 Pyle Karaoke Wireless Bluetooth Amplifier9.3 Fosi Audio Store BT20A Stereo Audio AmplifierⅩ FAQ   Ⅱ Bluetooth Amplifier Related  Video:Bluetooth AmplifierBluetooth Amplifier Video Description:Amplifier Bluetooth simple cocok buat kamu yang nggak mau ribet, cuma pakai speaker woofer 4-6inch dan 3-4inch buat vocal kamu bisa menikmati musik dengan banyak fitur.  Ⅲ What Is A Bluetooth Amplifier?Understanding technology is a difficult and time-consuming task. Because there is never a shortage of products brought to market. It is a tough task of staying on top. For instance, the Bluetooth headphone amp is such a product that it hasn't been around for very long, it's a good idea to start by defining it.A Bluetooth amplifier is a device that is intended to convert your favorite pair of wired headphones into wireless Bluetooth headphones by utilizing Bluetooth technology's radio frequency communication.Bluetooth AmplifierⅣ What Is Bluetooth?Bluetooth emerged as a technology in Sweden in the late 1990s. Its original goal was to limit the need for unnecessary cable connections between devices from various manufacturers.For example, if you have an Apple smartphone and a JBL or Bose speaker, it may be difficult to transfer an audio signal from one to the other as the two devices use rather proprietary connections.Bluetooth, on the other hand, allows devices to communicate with one another via short-range radio frequencies that alternate hundreds of times per second. This also contributes to security, making Bluetooth connections a very secure way to transfer data.Bluetooth Wireless Technology (BWT) has nearly limitless potential, particularly in the Internet of Things (or IoT), and is now used in smart speakers, smart home implementations, and a variety of other devices.Bluetooth Ⅴ Why You Need a Bluetooth AmplifierStream Music Through Your System Directly from Your AmplifierEliminate the Need of an Expensive Head UnitBoost Your System Ⅵ Common ApplicationsOne of the benefits of using a Bluetooth amplifier is that the device can offer you flexibility. What is more, ，While a Bluetooth amplifier is an excellent addition to your car's sound system, they are also ideal for marine and power sports applications, as well as just about any other application that requires an amplifier.amplifierIn the CarA Bluetooth amplifier is an additional, and possibly the most efficient, way to add Bluetooth to your vehicle. Many older stereos lack built-in Bluetooth simply because it was not a common feature at the time. Until Bluetooth amplifiers were released, the only way to add Bluetooth to your vehicle was to purchase a new, potentially expensive, Bluetooth head unit or a Bluetooth adapter that was compatible with your stereo. With a Bluetooth amplifier, you can kill two birds with one stone. You'll add the convenience of wireless Bluetooth streaming to your vehicle while also enhancing your current system. Some Bluetooth amplifiers also include a wired microphone, allowing you to make hands-free phone calls.On the BoatBluetooth amplifiers aren't just for use in your car; they're also great for listening to music while boating. Many boats don't even have a sound system, so if you want to add one, you'll probably have to build it from the ground up. A marine-rated Bluetooth amplifier eliminates the need for a head unit, saving you money while improving the overall performance of the system. And, just like in a car, if your boat has a sound system but the head unit isn't Bluetooth enabled, a Bluetooth amplifier can save you from having to replace the stereo.On the ATVAnyone interested in outdoor power sports is aware that free space is extremely limited. Because of this, installing a sound system in an ATV, UTV, SSV, or motorcycle can be a difficult task, and any space-saving measures you can take are invaluable. A Bluetooth amp can combine your source unit and amplifier into a single piece of equipment while still allowing you to play music through your system. Ⅶ How Bluetooth Amplifiers Works？ How Bluetooth Amplifiers WorksA Bluetooth amplifier is a very simple piece of equipment. It functions and installs similarly to any other amplifier (they can be connected to a source unit, but it is not required), but it includes an integrated Bluetooth module that allows you to connect virtually any Bluetooth-enabled device (smartphones, tablets, etc.) to it wirelessly. Bluetooth amps eliminate the need for a traditional head unit by allowing the amp to function as both the transmitter and the receiver.  Ⅷ Three Things You Need to ConsiderWatts of amplifier: This number indicates the maximum power output of your amplifier. As the power output of the speakers you're going to connect to your amplifier increases, so should the power output of your amplifier. Otherwise, you won't be able to get good sound quality. The total power output of your amplifier must be greater than or equal to the total power required by all of the speakers you intend to connect to it.Bluetooth version: Bluetooth 5.0 is the most recent Bluetooth version. Obsolete Bluetooth versions are not recommended for purchase because they are difficult to pair and have a limited operating range. Furthermore, you will not experience faster data transfer speeds when compared to the most recent version.Impedance: The impedance of your amplifier determines the quality of music you will hear. It should always be the same as the impedance of your speakers. As a result, always ensure that the impedance of your amplifier is equal to the total impedance of all the speakers you intend to connect to it. Ⅸ Recomendation Bluetooth AmplifiersThere are all kind of Bluetooth Amplifiers and the following three are the most popular at the present. This part will introduce their specifications, pros and cons.9.1 Sony STRDH190 2-CH Stereo Bluetooth Audio AmplifierSony STRDH190 2-CHSONY is without a doubt the best brand in the world when it comes to electronic items. If you are willing to pay a premium, there is no other brand that can compete with the quality of SONY products. Another example is their STRDH190 2-CH HOME STEREO RECEIVER.You can connect two pairs of speakers to it if A/B switching is enabled. With A+B mode, you can also switch between A and B to play speakers separately in two different rooms, or you can play all four speakers at once in the same room. It also has a full-size 14" headphone jack for listening to music through a headset.The STRDH190-2 AMPLIFIER features HI-RES AUDIO, which allows you to hear music as if the artist were performing in front of you. It has a high-capacity transformer that produces clear, distortion-free sound. Its redesigned design reduces transmitted vibrations from speaker sound pressure, providing you with more focused and powerful sound.This amplifier also has an FM RADIO feature. It comes with 30 pre-programmed radio channels. Its remote-control feature allows you to change audio settings from a distance, making you feel less tired and more at ease. The STRDH 190 2-CH Bluetooth amplifier has a low 5 14" height and will easily fit into your A/V cabinets. SpecificationsType: Amplifier with two channelsInput: Bluetooth input/4 RCA inputs/3.5mm aux inputImpedance: 6-16 ohm impedanceMaximum o/p power: 100 watts x 2 Work AC voltage range: 120-230 voltsRemote control and an FM antenna are included as extras.Dimensions: 11x17x5.2inches17 pound weightWarranty period: 12 monthsProsHigh output powerRemote control capabilityConnects to paired Bluetooth devices automatically.The FM tuner automatically searches for channels in your area.ConsLarge size and weightExpensive in terms of price. 9.2 Pyle Karaoke Wireless Bluetooth AmplifierPyle Karaoke WirelessPyle is a leading producer of high-quality home audio, car audio, and Pro Audio DJ speaker systems. To meet the diverse needs of consumers, the American brand creates a wide range of audio systems with advanced features.Pyle's Bluetooth amplifier has a power rating of 500w and is designed for amplifying multiple speakers with impedances ranging from 4 to 8 ohms. Furthermore, the amplifier has four channels, making it ideal for your PA and home theater system. It has Bluetooth version 4.0 and a decent range for pairing with all of the latest smart devices such as smartphones, laptops, and PCs.The Bluetooth amplifier has 7 input ports for a variety of connectivity options. There is a USB port, a micro SD slot, an FM radio, an AUX port, an MP3 slot, an audio port, and a REC. In addition, there is subwoofer output (L/R) connectors and two 14-inch microphone inputs.The amplifier includes a talk-over function for voice-over, announcements, and paging. When you activate the talk-over mode, the audio will be paused so that you can speak. The crisp buttons and rotary knob make the amplifier simple to use. You can adjust the equalization and volume using the rotary knob. The package also includes a remote control for controlling the amplifier from a distance.Despite the fact that the warranty period is not explicitly stated on the product page, all Pyle products come with a one-year warranty from the date of purchase. SpecificationsAmplifier with four channelsBluetooth/FM radio/AUX/two 14-inch microphone inputs/headphone jack/MP3/USB/SD card inputMaximum o/p power: 500 watts20Hz to 20kHz frequency response4 to 8 ohms in impedanceUp to 30 radio station presets are available.>81 dB signal-to-noise ratioRemote control/FM antenna is a unique feature.Dimensions: 13 x 9.84 x 3.54 inches10.3 pounds1-year warrantyProsProvides four channelsRemote control is used to control the unit from a distance.The FM tuner has an LCD.Wireless range of more than 40 feetConsUses an older Bluetooth version 4.0A bit heavy  9.3 Fosi Audio Store BT20A Stereo Audio AmplifierFosi Audio Store BT20AA FOSI product is next on the list of best Bluetooth amplifiers. This time, it's the BT20A amplifier, which has a maximum output of 200 watts. This allows you to use the same amplifier to power two passive speakers of 100 watts each.It has a built-in CSR64215 chip that provides a strong and stable Bluetooth connection with a range of 50 feet. You will enjoy exceptional music clarity thanks to the TPA3116D2 chip, which provides harmonic distortions of less than 0.04 percent even at high volumes.Again, using the bass and treble control knobs, you can adjust the music output to your liking. It also has a built-in power circuit that prevents sparking when you plug in your amplifier, making it safe to use.The sleek curved edges design of the FOSI BT20A is another feature that draws customers in. This allows you to handle it comfortably without experiencing any sharp pain in your palms. SpecificationsClass D, two-channel amplifierBluetooth and RCA inputs are available.2-8 ohm impedanceMaximum o/p power: 2 x 100 watts (200watts max)AC 110-240 volts is the working voltage.24v DC/4.5A power adapterA unique feature is that it includes a Bluetooth antenna.Dimensions: 5.2 x 3.54 x 1.42 in.2.09-pound weightPros18-month warrantyPowerful output.The bluetooth range is greater than that of the bt10a amplifier.Curved round edges are gentle on your hands.ConsThere is no remote control feature. Ⅹ FAQ1. What is a Bluetooth amplifier used for?A Bluetooth amplifier is designed to convert your favorite pair of wired headphones into wireless Bluetooth headphones by harnessing the radio frequency communication of Bluetooth technology.2. Can you connect an amplifier to a Bluetooth speaker?You can connect your receivers to a wireless speaker by using a Bluetooth transmitter. Plug the Bluetooth transmitter into the headphone port of the receiver. Turn on the receiver after plugging it into a power source.3. Is a Bluetooth amplifier worth it?If you can get yourself a decent set of Bluetooth headphones, then the answer to whether or not headphone amps are worth it is a resounding no. ... A headphone amp increases low voltage audio signal from a source device, allowing the signal to be converted into a sound wave by your headphones4. Do I need a Bluetooth amp?Bluetooth headphones will never need an amplifier, as the headphones themselves deliver the power to the drivers internally. Editor's note: this article was updated on June 14, 2021, to expand upon technical information.5. What is a Bluetooth audio amplifier?The product is simple, bluetooth audio transmitter equipment that can be connected to speakers and other devices, play music through bluetooth wireless transmission. ... At the same time, the product is a multifunctional amplifier for bluetooth speakers. 

IntroductionNowadays, more and more mobile phones support NFC function. Of course, many people don’t know what NFC really is. Near-Field Communication (NFC) is a short-range wireless technology. NFC has functions of mobile payment, data transmission, information browsing and access control. It provides a simple, touch-sensitive solution to exchange information, access content and services simply and intuitively. At the same time, NFC has the characteristics of low cost, easy to use and more intuitive, which makes it more potential in certain fields.What is NFC? How NFC Works? Applications of NFCCatalogIntroductionⅠ What is NFC On Phone?Ⅱ NFC Application ModeⅢ NFC Operational ModeⅣ NFC Uses On PhoneⅤ Which Phones Have NFC?Ⅰ What is NFC On Phone?In theory, NFC is a set of protocols for communication between two electronic devices about four inches at the most. So you device have to be very close to another NFC enabled device to transfer the data or do payment, in other words, long distance or non NFC devices will not be able to operate normally. NFC evolved from the integration of radio-frequency identification (RFID) and interconnection technology. It combines inductive card readers, inductive cards and point-to-point functions on a chip, which can identify and exchange data with compatible devices within a short distance exchange. NFC was originally a simple merger of RFID technology and network technology in the pass, and now has evolved into a short-range wireless communication technology. With the popularity of smart phones, it develops rapidly.Like RFID, NFC information is also transmitted through electromagnetic induction coupling in the wireless frequency part of the spectrum, but there is still a big difference between the two. First of all, NFC is a wireless connection technology that provides easy, safe, and rapid communication experience. Its transmission range is smaller than that of RFID, because RFID can support several meters or even tens of meters. What’s more, due to the unique signal attenuation technology adopted by NFC, NFC has the characteristics of short distance, high bandwidth, and low energy consumption.With NFC mobile phones, people can get the services and transactions at any place in any time. In short, through NFC-supported devices, people can complete payment or transfer data.Ⅱ NFC Application ModeNFC devices can be used as contactless smart cards, write/read terminals, and device-to-device data transmission paths. It has a wide range of applications, which can be divided into three basic types:Close→Finish. For applications such as access control or traffic/event ticket checking, users only need to bring the device storing the ticket or access code close to the reader. It can also be used for simple data capture applications, such as reading URLs from smart tags on posters.Close→Confirm. In applications such as mobile payment, the user must enter a password to confirm the transaction, or only accept the transaction.Close→Connect. By linking two NFC-enabled devices, you can perform point-to-point network data transmission, such as downloading music, exchanging images, or synchronizing address books.NFC devices may provide more than one function. Consumers can explore and understand the functions of the device and find out the potential functions and services of the NFC device. Ⅲ NFC Operational ModeNFC uses two-way recognition and connection. Its working modes include card emulation, P2P mode and reader/writer mode. Both NFC and Bluetooth are short-range communication technologies, and are integrated into mobile phones. NFC does not require complicated setup procedures, and it can also simplify Bluetooth connections. The advantage of NFC is that its setup procedure is shorter, but it cannot reach the low power compared with Bluetooth. The maximum data transfer capacity of NFC is 424 kbit/s, which is much smaller than Bluetooth V2.1 (2.1 Mbit/s). Although NFC is inferior to Bluetooth in transmission speed and distance, it does not require a power source. For mobile phones or portable electronic products, NFC is more convenient to use.NFC is superior to infrared(IR) transmission and Bluetooth. As a consumer-oriented transaction mechanism, NFC is faster, more reliable and much simpler than IR, which requires strict alignment to transmit data. Compared with Bluetooth, NFC is not suitable for long-distance data communication and. So NFC and Bluetooth complement each other and coexist. In fact, NFC protocol can be used to improve the Bluetooth pairing process between two devices.Ⅳ NFC Uses On PhoneAs a bus and subway card. we all know that most of our bills can be paid by mobile phones, but we often face a problem, that is, forgetting to bring the card or change. Now we have an NFC-enabled mobile phone to reduce embarrassing situations. Turn on the local subway and bus functions on the mobile phone, so that we can use the mobile phone to pay. To put it simply, the NFC function can turn your mobile phone into a bus card, you can also recharge the bus card online, and you can read the card data to check the balance, etc. At present, the most widely used field of NFC is also in bus/subway card.As a door-access card. It’s really troublesome to forget to bring the access card, but now we don’t have to worry, because the NFC function of the mobile phone can also be used directly as the access card to enter the door. We only need to click the virtual key in the mobile phone, and then place access card on the back of the mobile phone for data reading. After reading the relevant information, we can directly use the mobile phone’s NFC to act as the access card.Read the bank card information directly. For example, we usually need to check the consumption records of our bank card. We need to download the bank’s official software to be able to check or go to the bank. If the mobile phone has the NFC function, we can get the bank card information according to the relevant operation, like the bank card’s consumption records and balances, which is very convenient for us.Bluetooth speakers connected to NFC, there are many Bluetooth speakers on the market that are also equipped with NFC function. When we connect, we only need to use a mobile phone that supports NFC function to turn on the Bluetooth speaker, which is more than we need to set up Bluetooth before. Pairing connection is much more convenient.File transfer, although we can use the network to transfer files now, the speed is very fast, but if the mobile phone does not have a network, the NFC function is more important, only need to use the NFC function of the two mobile phones Open and paste together, we can transfer music, pictures or files, which is still very useful. Of course, now the same brand of mobile phones also have their own fast data transmission function, and no network is required.The above are some practical small functions that NFC can bring in mobile phones, which is still very practical for our lives. Of course, there are more other similar functions, we can stack them according to the actual situation.Ⅴ Which Phones Have NFC?The following smartphone models are all from the official website data, but there will be gaps in different regions, and all local models shall prevail.HuaweiSamsungMate X2, Mate XS, Mate X, Mate 40 RS, Mate 40 Pro+, Mate 40 Pro, Mate 40, Mate 40E, Mate 30, Mate 30 RS, Mate 30 Pro, Mate 30 Pro 5G, Mate 30 5G, Mate 20, Mate 20 RS, Mate 20 X 5G, Mate 20 X, Mate 20 Pro, Mate 10, Mate 10 Pro, Mate 9, Mate 9 Pro, Mate 8, Mate 7, Mate SW21, W20Z Fold2, Z FlipJ7 Pro, J7+, J7(2016), J5, J4, J3C9 Pro, C7 Pro, C7, C5 Pro, C5GRAND Prime, MEGA2, ALPHA G8508S, CORE Lite 4G, CORE AdvanceP40 Pro+, P40 Pro, P40, P30 Pro, P30, P20 Pro, P20, P10 Plus, P10Note20 Ultra, Note20, Note10+ 5G, Note10+, Note10, Note10 Lite, Note9, Note8, Note7, Note5, Note4, Note3nova 8 Pro, nova 8, nova 7 Pro, nova 7, nova 6, nova 5 Pro, nova 2sA90, A80, A71 5G, A71, A70, A60, A51, A50s, A31, A21s, A20, A9 Star Lite, A9, A8S, A8+, A8S21 Ultra, S21+, S21, S20 Ultra, S20+, S20, S10 5G, S10+, S9+, S9, S8+, S8 OnePlusMicrosoft LumiaOnePlus 8 Pro, OnePlus 7 Pro, OnePlus 7, OnePlus 6, OnePlus 5, OnePlus 3, OnePlus 1,OnePlus 8T, OnePlus 7T Pro, OnePlus 7T, OnePlus 6T, OnePlus 5T, OnePlus 3TLumia 950 XL, Lumia 950, Lumia 930, Lumia 925, Lumia 920, Lumia 650, Lumia 640 XL, Lumia 640 Apple IphoneSony Xperiaiphone 12 Pro, iphone 12, iphone 12 mini, iphone 11 Pro Max, iphone 11 Pro, iphone 11iphone XS Max, iphone XS, iphone XR, iphone Xiphone 8 Plus, iphone 8, iphone 7 Plus, iphone 7, iphone 6s Plus, iphone 6s, iphone 6 Plus, iphone 6iphone SE 2, iphone SEXperia 1, Xperia XZs, Xperia XZ2 Compact, Xperia XZ2 Premium, Xperia XZ2, Xperia XZ Premium, Xperia XZXperia XA2 Ultra, Xperia XA1 Ultra, Xperia XA1 Plus, Xperia XA1, Xperia X CompactLT29i, LT26i, MT27i, Xperia L1, Xperia E5 HTCLGHTC U UltraHTC Desire 21 Pro, HTC Desire 20+, HTC Desire 20 Pro, HTC Desire 19S, HTC Desire 19+, HTC Desire 12S, HTC Desire 626HTC U20 5G, HTC U12 Life, HTC U12+, HTC U11+, HTC U11, HTC U11 EYEsHTC 10 lifestyle, HTC 10New HTC One, HTC One E9+, HTC One M9, HTC One M8LG G7fitLG G7+ ThinQ, LG G7 ThinQ, LG G5, LG G4, LG G3, LG G2LG Q Stylus+, Q6+, Q6LG V40 ThinQ, LG V35 ThinQ, LG V30+, LG V30, LG V20, LG V10LG Stylus 3, LG Stylus 2+LG AKA RealmeZTERealme GT, Realme X50m, Realme X50 Pro, Realme X50, Realme X2 Pro, Realme X2ZTE Axon 7s, Axon 20 5G, Axon 11 5G, Axon 10 Pro 5G, Axon 10 Pro, ZTE T900, ZTE A602NubiaBlackBerryZ17 S, Z17, Z11, Z9 Max, Z9, Z7 Max, Z17 mini, Z5 mini, Z5S(LET)keyone, 9900, 9810(4G) Frequently Asked Questions about NFC Technology1. What is NFC technology?Near-Field Communication (NFC) is a set of communication protocols for communication between two electronic devices over a distance of 4 cm (11⁄2 in) or less. NFC offers a low-speed connection with simple setup that can be used to bootstrap more-capable wireless connections. It is a contact-less communication technology based on a radio frequency (RF) field. 2. How does near field communication NFC work?Near-field communication transmits data through electromagnetic radio fields to enable two devices to communicate with each other. To work, both devices must contain NFC chips, as transactions take place within a very short distance. 3. Do all mobile phones have NFC?All the latest Android smartphones can scan NFC without an app but there are a few older models that do not support NFC. 4. Is RFID same as NFC?The short answer: RFID stands for Radio Frequency Identification, a one-way communication method at varying distances. NFC, or Near Field Communication, is a version that allows for two-way communication. NFC is not totally contactless, typically requiring devices to be within a few inches of each other. 5. What is NFC vs Bluetooth?NFC is great for transferring small amounts of data over a very short distance and is used mostly for wireless payments and access cards. Bluetooth allows for a more extended range of connectivity and devices such as cellphones, speakers, and headphones commonly use it.

Sony's advance in image sensors appears quite natural: the company has developed a set of curved CMOS image sensors based on the curvature of the eye. A report on the sensors in IEEE Spectrum said that, "in a bit of biomimicry," Sony engineers were able to achieve a set of curved CMOS image sensors using a "bending machine" of their own construction.Sony's Kazuichiro Itonaga, a device manager, reported on the new development in Hawaii, at the 2014 Symposia on VLSI Technology and Circuits. This is a conference on semiconductor technology and circuits, which took place from June 9 to June 13.It was unclear how much the chips were curved, said IEEE Spectrum, although Itonaga said they did achieve the same level of curvature found in the human eye. The curved systems were 1.4 times more sensitive at the center of the sensor and twice as sensitive at the edge, according to the Sony engineers.According to IEEE Spectrum, "Photodiodes at the periphery of a sensor array will be bent toward the center, which means light rays will hit them straight on instead of obliquely. What's more, the strain induced on a CMOS sensor by bending it alters the band gap of the silicon devices in the sensor region, lowering the noise created by 'dark current'—the current that flows through a pixel even when it is receiving no external light." A curved CMOS sensor has an edge over a planar sensor, Itonaga noted. Considering its geometry, it can be paired with a flatter lens and larger aperture, which lets in more light.Two chips were reported. First, there was a full-size chip that measured some 43 millimeters along the diagonal, suitable for a camera. A smaller chip with smaller pixels suitable for mobile phones was also reported. Gizmodo said the 43mm was possibly to suit a follow-up to the RX1 compact camera. There is no date yet on when the sensors will make their way into consumer products, but IEEE Spectrum said the team made about 100 full size sensors with their bending machine. No official word yet on when the sensors will show up in products for sale has not deterred speculations on how and where they might appear. SonyAlphaRumors said the full frame curved sensor is likely to come on the new RX2. No matter when, PetaPixel a photography blog, said on Friday that the curved full-frame sensor promises to be "an impressive leap forward in digital imaging technology:"