Package Included:<br />1 x Bicycle Speaker<br /><br />Specification:<br />Rated Power:3W<br />Frequency Response:100~20KHz<br />Rated Impedance:4Ohm<br />Music Format:MP3/WMA/WAV<br />Bluetooth Standard: Bluetooth3.0+EDR<br />Transmission Distance: Within 10M<br />Interface: Micro USB<br />Power Adapter:DC 5V・500mA<br />Specifications:3.7V 400mAh<br />Size:130*80*68mm<br /><br />Features:<br />1.Compatible with all bikes including road bikes.<br />2.Easy and safe to use when braking.<br />3.Extremely loud & clear sound.<br />4.Easy to install and fit for all bicycles.<br />5.Loud dual tone announces rider's presence in style<br />6.Classic trumpet-style shape offers timeless retro look・new design and stylish.<br /><br />