Material:aluminum alloy + plastic<br />Weight:1050g<br />Size:30mm<br />Voltage:DC12V<br />Output power:4 x 15W<br />Output frequency range: 20Hz-20Khz <br />Remote Control Distance: less than 100 meters on open land<br />Operating temperature range: -30∪ ~ +60∪<br /><br /><br />Features:<br />* Aluminum alloy shell， beautiful and durable， not easy broken.<br />* With anti-theft function. When it is shook， it will make sounds alarm.<br />* Support SD card to play MP3 music and FM.* Adapt to any motor bike or electric bicycle<br />* Wireless remote control.<br /><br />Package Included:<br />1x MP3 host<br />2x speakers<br />1x remote control<br />2x wires<br />12x screws<br />2x metal plate<br />1x user manual