Feature: 1, support MP3 / WMA / WAV 2, support Bluetooth 5.0 3, with digital tube display; 4, support MMC / SD / MMA and other cards, support USB interface (U disk); 5, power failure memory function 24C02; 6, support 5-10 meters distance infrared remote control operation; 7, support external audio input LINE IN (AUX); 8, support radio FM, receiving frequency band (87.5MHZ-108.0MHZ); 9, button: four-button multi-directional control, VOL- / AUTO / VOL + / MODE; Operation details: 1. VOL-(previous song/volume reduction): In MP3 state, VOL-short press is the previous song, long press is for volume reduction; in FM state, short press to adjust one station number; in Bluetooth Short press under the function is the last song of Bluetooth, long press to decrease the volume. 2. AUTO (play/pause): In the MP3 state, AUTO is short-pressed to play/pause; in the FM state, short press is play/pause, long press is for automatic receiving and saving; in Bluetooth function, short press to play /time out. 3, VOL + (the next song /volume increase): In the MP3 state, VOL + short press for the next song, long press for the volume to increase; short press in the FM state to adjust a station number; under the Bluetooth function Short press for the next song of Bluetooth, long press for the volume to decrease. 4, MODE: switch between USB/SD/FM/AUX/Bluetooth function Package Includes: 1*MP3 Decoder Board