Are you looking for a professional, yet wireless amplifier? Are you in search of a sturdy, trustworthy tool that can do multiple works at once? , ! Our professional wireless amplifier must meet your needs. It is one of the for you. Features - Color: Black. - Size: 8.50X3.30X3.20cm/3.34X1.30X1.26 inch. - Material: Plastic. - Power amplifier: 2 x 3W. - Radio FM frequency band: 87.5MHZ-108.0MHZ - Remote controlled distance: 5-10M. - Voltage: DC 5V. - VOL- button (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 number; in wireless short press under the function is the last song of wireless, long press to decrease the volume. - AUTO button (play/pause): In the MP3 state, AUTO is short pressed to play/pause; in FM state, short press is play/pause, long press is for automatic receiving and saving; in wireless function, short /time out. - VOL+ button (the next song / volume increase): In the MP3 state, short press for the next song, long press for the volume to increase; short press in the FM state to adjust number; under the wireless function Short press for the next song of wireless, long press for the volume to decrease. - MODE button: between USB/wireless/ /FM/AUX function. - Adopts precision production to the stable characteristics and high reliability. Package list: 1 x Board (with Cable)