DROK Portable Wire~Less Blue~Tooth Audio Receiver Board, Support TF Card USB Decording Play, Blue~Tooth Stereo Music Transmitter Module for Headphones HiFi Amplifier, Black

"Features: Three kinds of audio input: Blue~tooth receive; USB decoding play; TF card decoding play. Power: DC5V; Effective blue~tooth transmission distance: 10-15 meters. Support multiple formats: MP3, WMA, WAV, FLAC. The front output can directly promote headphones or connect rear amplifier. Key Operation: MODE: press the MODE button to switch among three kinds of audio input, Blue~tooth receive; USB decoding play; TF card decoding play. NEXT: short press the NEXT button to play the next song, long press the NEXT button to increase volume. BACK: short press the BACK button to play the previous song, long press the Back button to decrease volume. EQ: sound effect manager(only valid under USB or TF card playing mode). Audio Output: for connecting headphones, active loudspeaker box or amplifier(if yours is passive loudspeaker box, please connect amplifier first). Connection: 1. First off it's a Micro USB connection for power, powered by DC 5V, or if you want to solder your own power then you can take that r...