Product Features: x LED color screen: digital screen display. x Infrared receiver module(Support remote control). x Input voltage: 5 12V. x Support USB, TF, FM. x Support Bluetooth (wireless music playback after pairing with mobile phone). x Support USB/TF/Bluetooth/FM/LINE switch. MP3/WMA, WAV lossless music decoding chip. x Volume range 1-50. x FM frequency range (international) 76-108MHz. x Support USB/TF card switching, PREV, NEXT, fast forward, fast reverse, volume, EQ, play/pause, stop, single repeat, mute, shutdown, and direct selection. x Support Bluetooth PREV, NEXT, volume, EQ, play/pause, mute, close. x Enjoy music anytime, anywhere in the car. product upgrade: 1) A diode is added to provide reverse connection protection. 2) Removed the voice prompt. 3) Power-off memory function. Button function introduction: USB: Connect U disk (maximum support 32GB). TF: Connect TF memory card (maximum support 32GB). AUX: Audio input interface VOL-: Short press to select the previous song; long press to decrease the volume SCAN: Short press is to switch between pause and play; the long press is to radio FM automatic station VOLand: Short press to select the next song; long press to increase the volume MODE: Switch between USB/TF/FM/LINE IN/Bluetooth modes Decoder Bluetooth name: BT-Speaker or kebidu BT5.0 Package Included: 1 X MP3 decoder board 1 remote control 1X amplifier board (optional) Note: For safety, the remote control does not contain batteries. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.