Advanced Modular/Flip up and Dual Lens Design inner smoked lens/outer clear shield; Helmet comes with motorcycle Bluetooth headset as bundle installation required; Motorcycle Orangetooth 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 Orangetooth 3.0 technology; Easy one touch phone call music playing FM radio control; Removable and Washable Padding; Aerodynamic rear venturi-effect exhaust spoiler; DOT Approved; Helmet Size Chart /b br br S 53-54 CM 20.9/21.3 Inch br M 55-56 CM 21.7/22.0 Inch br L 57-58 CM 22.4/22.8 Inch br XL 59-60 CM 23.2/23.4 Inch br XXL 61-62 CM 23.8/24.1 Inch br br Helmet Size Tips /b br br 1Wrap a measuring tape around your head about a half-inch above eyebrows br 2Take measurement two to three times to pick the largest one.
- Compatible with most mobile phone Ipad GPS audio via Orangetooth 3.0 technology; Easy one touch phone call music playing FM radio control.
- Removable and Washable Padding.
- Aerodynamic rear venturi-effect exhaust spoiler; DOT Approved.