V2-500A 500m full duplex motorcycle bluetooth helmet interphone wireless motorcycle helmet bluetooth intercom Specification: Maximum talking range 500 meters intercom between two riders, real two-way wireless communication between three riders by Bluetooth system Up to 120Km speed working Up to 7 hours talking time Safe auto-receiving cell phone calls after 3 second, Advanced A2DP & EDR Bluetooth profile Stereo music/audio function (transmits from A2DP enabled cellphone/MP3/GPS) Wind noise DSP cancellation this bluetooth intercom Water-resistance, all weather, Friendly for gloves wireless motorcycle helmet bluetooth intercom Packing: Unit G.W/CTN:0.3kg Unit Carton measure: 170*130*50 mm PCS/CTN:60PCS Product background and development: Netphone Technology Limited successfully research the first model for the wireless motorcycle helmet bluetooth intercom , and applied for the patent successfully. After then, we have applied this technology into motorcycle helmet bluetooth intercom , the featured product is V2-500 on the world market. The next generation, we have boost our the distance to 1KM, 2KM, and more, we make it multi-functional, FM, stereo etc. the V2-500C, V6-1200, V8-2000. Now to meet the same time talk and listen, we launch the V4-1200 in 2013. We wish Vnetphone brand will help your business growing in the 2014.