Descriptions: This device allows bikers to talk via bluetooth directly without other devices. You can receive a cell phone call without pressing a button. You can enjoy your favorite stereo music from your A2DP enabled cell phone or MP3 player or perhaps listen to the audio navigation message from your Bluetooth enabled GPS. You can do all these things even if you are riding or snow skiing Features: Maximum talking range 500 meters between two riders. Works as bluetooth handsfree for cell phone at range of up to 10 meters Wireless communication between three riders by Bluetooth system. Suited to any sort of helmet for motorcyclists. Up to 5 hours talking timeUp to 300 hours standby. Safe auto-receiving cell phone calls. If donot want to answer reject and hang up with one button. Support voice dialinglast number dial Listen music/audio wirelessly through A2DP from bluetooth music deviceor connect GPS Control cell phone music through AVRCP: forward backward play pause. Freely switch between bluetooth cell phone bluetooth intercom stereo music With DSP for echo cancellation and noise suppression technology crystal clear voice quality is guaranteed in a high speed. Button panel is water-proof and sun-proof while the design is durable Easy installation. Modern black decent design. Ideal for motorcycle and skiing helmet Package Include(in original package): 1 x BT headset recievers 1 x Stereo Headphones 1 x Headsets clip with fastening screws 1 x AC Charger/Adapter (USAUUK and EU styles for choosing we\'ll choose one according to your location.) 1 x USB Cable 1 x manual