The SCALA RIDER Q2 Multiset is the latest and greatest among the SCALA RIDER line of Bluetooth helmet mounted headsets. The SCALA RIDER Q2 Multiset by Cardo is a technological gem that allows bikers to receive GPS voice instructions, communicate with the passenger on the back seat, to conduct calls on their mobile phone and listen to the embedded FM radio. Last but not least, the Scala Rider Q2 Multiset offers biker-to-biker communication. Multi twin pack contains two helmet headsets. Designed and Engineered for Heavy-Duty Performance giving Bike-to-Bike intercom communications among up to three bikers within a range of up to 500 m / 1,640 ft. in open areas. Rider-to-Passenger communications: Passenger may also conduct mobile phone calls or listen to the FM radio independently. Connect to a Mobile phone or GPS Bike-to-Bike intercom communications among up to three bikers within a range* of up to 500 m / 1,640 ft. Rider-to-Passenger communications: Passenger may also conduct mobile phone calls or listen to the FM radio independently. Full Duplex: No longer the walkie-talkie syndrome where one party can only speak when the other is silent. The SCALA RIDER Q2 allows simultaneous speaking and listening between bikers and passengers. Follow GPS audio instructions while riding your motorcycle. Weather protected headset fits any motorcycle helmet even under rain and snow conditions Self-installation of entire system within 5 minutes. Instant quick-release and re-attachment mechanism for headset unit. HIB (High Impact Balancing) Microphone for inter-city speed conditions. AGC Technology: Speaker volume adjusts automatically according to ambient noise level and driving speed. No need to use volume buttons. VOX Technology. Receive or reject incoming calls by random voice control. Special clamp allows daily attachment or release of the headset from helmet within seconds.