Description 1. Bluetooth Audio Receiving Board, Audio Receiving Module, With USB TF Card Decoding And Playback, Front-End Output 2. Bluetooth Reception; Usb Decoding And Playback; TF Card Decoding And Playback Three Audio Source Input Methods 3. Support MP3, WMA, WAV, FLAC Playback Formats 4. 5vdc Power Supply (Mobile Phone Charger Can Power Small Usb Plug) 5. Pre-Amplifier Output Can Directly Drive Headphones Or Be Connected To A Post-Amplifier. Source Input :Bluetooth Receiving ;USB Decoding And Playing;TF Card Decoding And Playing Power Supply:5V DC(The for Original-Mobile Phone Charger Can Small Usb Plug Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:PCB Package Contents: 2 * Bluetooth Audio Receiver Module Only 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.