1.Parameter characteristics Supply 3.7-5VSNR 90dBTHD+N -70dBCrosstalk -86dBMaterial:PCBColor:BlackDNR 91dBSupport Profile A2DP/AVCTP/AVDTP/AVRCP/HFPLOS Greater than 15m2.Interface detailsUSB powered Universal -USB 5V supply3.7-5V Supply Pad External 3.7-5V lithium battery conversionLED indicator Bluetooth mode long blue light3.5mm stereo audio interface Standard 3.5mm interface, output stereo sound source, plug in headphones, connect amplifiers and other devicesInstructions:After the is turned on, the blue indicator lights up and enters the Bluetooth mode; the English "The bluetooth device is to pair" is displayed, indicating that the Bluetooth mode is entered and waiting for pairing; the "VHM-314" searched by the mobile phone Bluetooth is the device name of the decoding board. Click on the connection, the decoder board prompts "The bluetooth device is connected successfully", indicating that the decoder board and the mobile phone are connected successfully, you can play music.Package Contents:1 x VHM-314 V.20 Bluetooth 5.0 Audio Receiver BoardOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.