Features : Full Duplex Wirless Bluetooth Handsfree Intercom Communication Up to Pair 6 Riders & Talk Between Any 2 of Them 1,200M (3,280 Feet) Intercom Range A2DP Bluetooth for Wireless Music & Audio GPS Direction High-End Supreme Sound With Advanced Noise Cancellation Technology Auto Receiving Cellphone Calls & Intercom Calls 3.5mm Line-In For External Audio Device Waterproof Design, Handles All Weather Conditions Plug Earphone & Microphone In Helmet - Fits Into The Ear Well Of All Standard Helmet Up to 120km/h Speed Up to 12 Hours Talk Time, Almost 360 Hours Standby Time    Package Includes: 2 x Main Unit 2 x Slim 5mm Hi-Fi Stereo Speaker 2 x Boom & Velcro Microphone for both full-face and open-face style helmet 2 x Mounting Bracket & Clamp(Metal clip) 2 x DC Power Charger (We have US/AU/EU adapter, will send it depend on your country, you can also tell us the adapter you need) 2 x USB Cable 1 x User Manual