... with usb and sd card slot wireless remote 1000 pcs per day to output Audio mp3 decoderMode No.: ES-526MSpecification:Main Function ... mini reader, mini amplifier, inserted card mp3 player, mp3 audio, car audio,hi-fi mp3 loudspeakerOperation in Key board:1,PLAY/PAUSE ... , VOL- :Press - for 1 second to select Volume- . ES-526M Audio mp3 decoder