Product Features: * LED color screen: digital screen display * Infrared receiver module (supports remote control) * Input voltage: 5V-12V * Supports USB, TF card, and FM * Supports Bluetooth for wireless music playback when paired with a mobile phone * Supports switching between USB, TF, Bluetooth, FM, and LINE IN inputs * MP3, WMA, and WAV audio format support * Volume range: 1-50 * FM frequency range: 76-108MHz * Supports USB/TF card switching, previous track, next track, fast forward, fast reverse, volume control, EQ, play/pause, stop, single repeat, mute, shutdown, and direct selection * Bluetooth controls: previous track, next track, volume, EQ, play/pause, mute, and power off * Enjoy high-quality music in your car anytime Product upgrades: 1) Added diode for reverse connection protection 2) Removed voice prompts 3) Power-off memory function Button functions: USB: Connect USB drive (supports up to 32GB) TF: Connect TF memory card (supports up to 32GB) AUX: Audio input interface VOL-: Short press to go to previous song; long press to decrease volume SCAN: Short press to play/pause; long press to enable FM auto scan VOL+: Short press to go to next song; long press to increase volume MODE: Switch between USB, TF, FM, LINE IN, and Bluetooth modes Decoder Bluetooth name: BT-Speaker or kebidu BT5.0 Package Included: 1 x MP3 decoder board 1 x remote control 1 x amplifier board (optional) Note: For safety, the remote control does not include batteries