BOBLOV BT-S2 1000M BT Motorcycle Helmet 2 3 Riders Headset Wireless Motorbike Interphone Hands Free FM Radio Maximum talking range 1000 meters between two riders(Broad environment with no any obstacle ). Works as handsfree for cell phone at range of up to 10 meters Wireless communication between three riders by system Listen music/audio wirelessly through A2DP from music device With DSP echo cancellation and noise suppression technology, crystal clear voice quality is guaranteed in a high speed