Model Number: MP3 Bluetooth Decoder Board LossPower Supply: 3.7-5V: 90dB + N: -70dBCrosstalk: -86dBDNR: 91dBSupport : A2DP / AVCTP / AVDTP / AVRCP / HFP:more than the 15mUSB powered Universal - USB 5V power supply3.7-5V Supply Pad External 3.7-5V lithium battery power conversionLED indicator Bluetooth mode long blue light3.5mm stereo audio interface Standard 3.5mm interface, output stereo , plug in headphones, connect amplifiers and other devicesAfter the power 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 for pairing; the "XY_BT" 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 . As shown ;colour:redMaterial:PC + MetalPackage Contents:1* MP3 Bluetooth Decoder ModuleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.