MainFeatures: 1.Maximum talking range500meters between two riders, real two-way wireless communicationbetweenthreeriders by Bluetooth system 2.Up to120Kmworking speed3.Up to7 hourstalking time 4.Safeauto-receivingcell phone calls5.AdvancedA2DP & EDRBluetooth profile 6.Stereomusic/audiofunction (transmits from A2DP enabled cellphone/MP3/GPS)7.Wind noise DSP cancellation 8.Water-resistance, all weather,9.Friendly for gloves