1The audio system support answering the calls and can be controlled by mobile phone application. 2Has the function of anti-slide and resistant to water. 3Support USB playing and memory card playing ,can play mp3 format songs and radio. 4The system support power cut memory function and equipped with a LED screen for information display. 5The speaker is integrated designed with LED light strip on the back of the machine.Features: The audio system support answering the calls and can be controlled by mobile phone application.Has the function of anti-slide and resistant to water.Support USB playing and memory card playing ,can play mp3 format songs and radio.The system support power cut memory function and equipped with a LED screen for information display.The speaker is integrated designed with LED light strip on the back of the machine.Specification: Color:Black/Golden/Silver(Optional) Wiring Diagram: Red to Battery Positive Black to Igniting Control Green to Battery Negative Waterproof: Four-grade waterproof (spatter proof) is not damaged by water spatterin any direction. (PS: If you do not cover the waterproof cover, you can't achieve the waterproof effect. If it is raining, you can't stay in the rain for a long time, it may cause damage) Output Wattage:2x10W 6ohm Rated Voltage:DC12V Output Frequency Range:20Hz~20KHz Working Temperature:-30~+60 Control Distance Compatible with Bluetooth>=6m Phone Charging Current:800mA Standby Mode Current:15mA Length(Without Bracket):205mm / 8.07in Length(With Bracket):310mm / 12.2in Diameter:60mm / 2.36in Suitable for Handle Bar Distance of 25~28cm,Diameter of 2~2.2cm Package List: 1 x Audio System 1 set of Installation Accessory