1Storm Dual Sport Helmet Motorcycle HGXP14A Full Face Motocross Off Road Bike + Motorcycle Bluetooth Headset Size:XL(61-62 CM 23.8/24.2 Inch ) (2)Take measurement two to three

(2)Take measurement two to three times to pick the largest one

wireless communication system support 6 riders group intercom within 1000 meters

Model: HB-BNF-B7

1000 meter communication

Suitable for most motocycle helmet types

1Storm Dual Sport Helmet Motorcycle HGXP14A Full Face Motocross Off Road Bike + Motorcycle Bluetooth Headset Size:XL(61-62 CM 23.8/24.2 Inch ) (2)Take measurement two to threeFeatures Ultra light weight durable aerodynamic thermoplastic alloy shell; Helmet comes with motorcycle Bluetooth headset as bundle (installation required); Beautiful glossy UV protective finish; Removable and washable padding; Motorcycle Bluetooth Headset supports up to 3 riders intercom, 800 meter communication, 10 hr phone talk time, 7 hr intercom talk and 300 hr standby time; Compatible with most mobile phone, Ipad, GPS audio via Bluetooth 3. 0