ITEM NAME:Car Bluetooth4.1 MP3 Decoding Board Speaker Amplifier Audio Receiver Module AU Product Description Description: Feature: 1. Support Bluetooth 4.1 Mode, Support automatically back to even, Support to decode WAV/APE/FLAC/MP3 files losslessly. 2. Support to output stereo, With 2W power amplifier on board. 3. Support USB Audio Function, Support the TF card downloading, Support U disk TF card Playing. 4. Support IR remote function. Specification: Power supply: DC4V-30.0V Signal to noise ratio: 90dB Total harmonic distortion + noise: - 70dB Crosstalk: - 86db Signal to noise ratio: 91dB Technical support: A2DP / AVCTP / AVDTP / AVRCP / HFP LOS:> 15m Micro USB power supply: general micro USB 5V power supply USB Audio: connecting computer through USB data cable can be used as external sound card U disk interface: supports playing MP3 / WAV / APE / flac files in U disk, and supports FAT16 / 32 file format LED indication: Bluetooth mode blue light is long, music mode blue light is flashing TF card interface: support to play MP3 / WAV / APE / flac files in tfcard, and support FAT16 / 32 file format Infrared remote control: it supports infrared remote control operation. See the following definitions for functions. AD key interface: key interface, providing different resistance parameters and realizing different key functions Bluetooth decoding IC: main control chip of decoding board 3.5mm stereo output: standard 3.5mm interface, output stereo sound source, plug in headset, connect power amplifier and other equipment Left channel 2W: audio left channel output, which can drive 2W speaker Right channel 2W: audio right channel output, can drive 2W speaker 2W * 2 power amplifier: two channel on-board 2W power amplifiers to realize stereo driven 2W speakers 3.7-5V power supply pad: realize external 3.7-5v power supply modification Module size: 50mm*40mm*9mm/1.96*1.57*0.35'' Remote control size: 85mm*40mm*5mm/3.34*1.57*0.19'' Package weight: 25g Key Functions: PREV/V-: "Short.Support to output stereo, With 2W power amplifier on board. See the following definitions for functions. U disk interface: supports playing MP3 / WAV / APE / flac files in U disk, and supports FAT16 / 32 file format.