5V WI FI Wireless Audio Receiver Board Module Compatible with Bluetooth USB TF Card Condition: Item Type: Audio Receiver BoardInterface:1. Micro USB Charging Interface: 5V power supply (universal Android interface and USB mobile phone charger) 2. 3.5 Stereo Outlet: Designed For headphones with 16-64 ohm impedance, the bass is stronger and more powerful. 3. LOUT/ROUT Audio Output Socket: stereo left and right channel audio output designed for the audio impedance of the speaker in the camera 4. 3.5 Stereo AUX Input: Designed for 3.5mm stereo audio input AUX signal input (press MODE button to AUX mode) 5. INL/INR Audio Input Socket: Stereo left and right channel audio input designed for audio impedance when the speaker is modified in the machine 6. M+/M-Microphone Interface: Connect the microphone part, when the song is suddenly called, you can press the play button to answer the hands-free call. 7. ADKEY Button Expansion Port: Simple 2-wire button socket, easy to expand according to the provided line and resistance parameter links 8. GND/+5V Solder Joint: The Internal modification is the solder joint of the 5V power input 9. USB Interface: Decode and Play the WMA/MP3/WAV music format file on the U disk, and support up to 64G USB flash drive. 10. TF Card Interface: Decode the WMA/MP3/WAV music format file on the TF storage, and support up to 32G capacity card.Button:1. MODE Function Mode Button: Short press the button to cycle through the "Bluetooth 1> AUX->USB->TF" several function modes 2. PLAY Play Pause Button: Short Press play/pause/answer call 3. NEXT Song Plus / Volume Plus Button: short press the next song, long press the volume to increase 4. PREV Song Plus / Volume Down Button: short press the previous song, long press the volume to decrease 5. EQ Sound Button: When playing USB and TF card music, short press with flat, rock, classical, jazz and other audio output