Martian Motorcycle Bluetooth Helmet Modular Full Face Flip up Dual Visor Bluetooth Headset: HM-BH

Features Advanced Modular/Flip up and Dual Lens Design (inner smoked lens/outer clear shield); Two Way: Motorcycle Bluetooth Headset supports up to 3 riders intercom, 500 meter communication, 12 hr phone talk time, 9 hr intercom talk,  3 hr charging time and 120 hr standby time; Six Way: Motorcycle Bluetooth Headset supports up to 6 riders intercom, 1000 meter communication, 12 hr phone talk time, 9 hr intercom talk, 3 hr charging time and 300 hr standby time; Advanced DSP echo cancellation and noise suppression technology provides clear music and intercom talk with built-in 2 premium speakers with full stereo sound; Compatible with most mobile phone, Ipad, GPS audio via Bluetooth 3.0 technology; Easy one touch phone call, music playing, FM radio control; DOT Approved;   Technical Details Brand: Martian Model: HM-Martian Shipping Weight: 5 pounds Manufacturer Part Number: HM-Martian CAPA Certified: DOT Certified   Helmet Size Tips (1)Wrap a measuring tape around your head about a half-inch above eyebrows (2)Take measurement two to three times to pick the largest one.