Newly developed half-duplex intercom function realizing talking in unlimited number of D3X Headset within 600m effective distance, more effective communication. Support music sharing function, support one D3X Headset in the 10m effective distance to share to more than one D3X Helmets, listen to the same song, together to get high. IP56 dustproof, waterproof, and rain resistant, fearless of dust and sand. Wake up the Al voice assistant with one click. 1000mAH high-capacity battery, charging time:2.5 hours,strictly selected high-voltage chip lasting 22 hours or so, fast charging riding all day long. Color: Black Material: plastic Package Contents: 1 x Motorcycle Helmet Headset 2 x Mics Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.