Specification: Main control IC: AC6925A Bluetooth IC: AC6925A Bluetooth 5.0 version Music format: MP3 or WMA or WAV or FLAC or APE lossless format Radio FM frequency: 87.5-107.5 MHZ Support function introduction: support MP3 or USB or TF or LINE IN or FM or BLUETOOTH Working voltage: 12V Panel size: 50 x 24 mm, the depth of the board is 35mm Features: PREV or VOL-: Short press is to select the previous song the long press is to decrease the volume NEXT or VOLand: Short press is to select the next song the long press is to increase the volume PLAY or PAUSE: Short press is the switch between pause and play the long press is the switch between USB or TF or FM or AUX or BLUETOOTH in the FM state, the pause play button is automatically search Package includes: 1 xBluetooth 5.0 Decoder Board 4 x Cables Note: This item comes without a retail box, but please rest assured that we will pack it well before shipping!