Model: DK-08Product InstructionDK08 helmet Bluetooth headset enables you to answer phone calls, enjoy music in your phone,and keep clear inter communication with companion under safe,And comfortable condition when driving a motorcycle or on the bicycle.1. Volume- Button (Answer the call/ the intercom Paring/ the intercom call/ end the intercom/shift intercom/FM Radio/volume down/ Blue LED Indicator)2. Volume+ Button (Power on/off/Reject call/Last number redial/ FM Search /Volume up /Play/Pause/ Red LED Indicator)Note: press and hold the volume -key for 3 seconds, you can switch freely between the three functions of " Music play /FM radio /AUX-in ".Stereo functions:Bluetooth® A2DP music PlayEnjoy music from Mobile phone or other music sourcesRemote control music play with AVRCPIndependent music volume control and memorizeMusic third priority after phone call and intercomMusic volume soft restore backGPS functions:Audio guide information from Bluetooth® GPS navigator by A2DP function or HFP.Independent volume controlFM Radio functions:Frequency covers 76~108MHzIndependent FM volume controlMobile phone highest priorityAUX-in function (Optional):Mp3 Player/Ipod can be connected to the Bluetooth headset.Plug and playMobile phone highest priority