Feature: 1. MESH PAIRING: The helmet headset built in 5.0 BT dual chip, MESH group one key pairing, can be paired with 32 BT headsets at the same time, to achieve 32 people simultaneously intercom. 2. 800M RANGE: This BT helmet headset supports motorcycle front and rear seat, or motorcycle direct full duplex call between, the maximum distance to 800m/875yd (depending on the test environment). 3. MULTI FUNCTION: Helmet headset supports 2 phones, automatically answer incoming calls, dial out, hang up, redial, voice dialing. Support phone music sharing, convenient control of music playback, pause and switch. 4. FM RADIO FUNCTION: Wireless motorcycle helmet headphone built in high sensitivity FM radio, clear sound quality, enjoy music, listen to the news, control of international current events, 10 channels to choose from. 5. NOISE CANCELLING AND LONG BATTERY LIFE: Motorcycle headphone built in DSP noise cancellation technology, large buttons, large volume design, easy to ride. 650mAh battery, continuous talk time up to 15 hours. How to Use: 1. Long press the power on, enter the BT pairing mode. 2. Open the BT function on your phone and search for pairing. Specification: Item Type: Helmet Headset Material: ABS Color: Black BT Protocol: 5.0, EDR Endurance: 15h Built in Polymer Lithium Battery: 650mAh Waterproof Level: IP65 Charging Time: 2h Package List: 1 x Helmet Headset Host1 x Soft Microphone 1 x Hard Microphone 1 x USB Cable 3 x Hook and Loop 2 x Screw 1 x Wrench 2 x Clip Accessories 1 x Double Sided Sticker 1 x Manual