USB / SD MMC Digital Player MP3-

USB / SD MMC Digital player mp3 USB, SD card decoding, FM radio digital attunement remote control, two channels, input and output set the preamp supply voltage :3-6V back/REW.Under U disk or SD/MMC card playing state press the key to switch to previous program .hold the key for over 2seconds to select program quickly backward.the player any starting from current program quickly select program and 1 programs may be sereached every 0.2second Next/FF under U disk or SD/MMC card playing state.press the key to switch to next/program quickly forward.the player may starting from current program quickly select program and 1 program may be searched every 0.2second Under SD/MMC card playing state.insert the U disk the player automatically switches to U disk playing state under U disk playing state. insert the SD/MMC card .the player automatically switches to SD/MMC card playing state.press the key to increase the volumepress the key to drop the volumepress the key to choose a variety pf music effect