Specifications: LED display and support bluetooth compatible function. Dual decoder, support MP3/WMA/WAV format. Support TF card, U disk and AUX line in. Support infrared remote control between 5 10m. Support FM radio, the search frequency band is 87.5MHz 108.0MHz. 4 buttons control, includes PLAY/PREV/NEXT/REPEAT/EQ/MODE. Button Instructions: Play: Short Press to play/pause in MP3 state, short press for play/pause in FM state, long press for automatic reception and save station. PREV (previous song/volume down): in the MP3 state, PREV short press is the previous song, long press is the volume is reduced, in the FM state, short press is to adjust a station number. NEXT (the next song/speaker is adjusted): in the MP3 state, NEXT is short pressed as the next song, long press is for the volume to increase, and in the FM state, short press is to adjust the station number downward. REPEAT (repeated): in the MP3 state, press the single repeat function, press to cancel the repeat function. EQ: sound field mode, test 6 kinds of sound quality: classical, jazz, rock, subwoofer, popular, normal. MODE (analog): switch among USB/SD/FM/AUX/Bluetooth. Type: MP3 Decoder Board Bluetooth: V5.0 Voltage: 5/12V (Optional) Music Format: MP3/WMA/WAV FM Frequency: 87.5 107.5MHz Function: Support USB Disk/TF/AUX/FM/Bluetooth Remote Control Battery: 1 x Button Battery (Not Included) Features: LED Display, Easy to Use, Button/Remote Control Board Size: 75.5mm x 5.1mm/2.97" x 2.01" (Approx.) Notes: Due to the light and screen setting difference, the color of item may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x MP3 Decoder Board 1 x Remote Control (Battery Not Included) 1 x Cable