Support 4-color color spectrum display.Support Bluetooth Bluetooth version 5.0 and hands-free calling. Support AUX, FM, USB, SD.Support MP3/WMA/WAV/FLAC/APE format music. Support Bluetooth Bluetoot on a song, next song, volume adjustment, play / pause, mute. Support power-off memory function: the song and volume played before the memory is powered off can be memorized to the current point. Support USB/SD card/Bluetooth/FM/switch.Turn on the default Bluetooth, if you have a card or a USB flash drive, put music directly. note: Different batches may have different appearance, which does not affect use. Material: plastic colour: Black Package Contents: 1 x Decoder Board 1 x Remote control 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.