Features 1.Support 4-color color spectrum display. 2.Support Bluetooth Bluetooth version 5.0 and hands-free calling. 3.Support AUX, FM, USB, SD. 4.Support MP3/WMA/WAV/FLAC/APE format music. 5.Support Bluetooth Bluetoot on a song, next song, volume adjustment, play / pause, mute. Specification Features: 1. Support 4-color spectrum display. 2. Support Bluetooth Bluetooth version 5.0 and hands-free calling. 3. Support AUX, FM, USB, SD. 4. Support MP3/WMA/WAV/FLAC/APE format music. 5. Support Bluetooth Bluetoot on a song, next song, volume adjustment, play / pause, mute. 6. Support power-off memory function: the song and volume played before the memory is powered off can be memorized to the current point. 7. Support USB/SD card/Bluetooth/FM/switch. 8. Turn on the default Bluetooth, if you have a card or a USB flash drive, put music directly. Specification: Bluetooth: Bluetooth 5.0 Music format: MP3/WMA/WAV/FLAC/APE Voltage: DC 5V / 12V Working current: 600MA-800MA Remote control battery: CR2025 button battery Opening: approx. 83 * 20 * 31mm / 3.3 * 0.8 * 1.2in Mounting hole spacing: approx. 92mm / 3.6 in Panel size: approx. 107 * 25 * 31mm / 4.2 * 1.0 * 1.2in Weight: approx. 70g Package list: 1 * Decoder Board 1 * Remote Control 2 * Cables 2 * Screw Plugs Package List