Excellent Waterproof: The IPX6 waterproof is adopted. Even on rainy or days, it will not affect the use, make your outdoor riding more exciting. Motorcycle helmet communication supports wireless BT music streaming and hands-free operation so you can easily enjoy the music or answer / reject the call. It's specially designed for helmet sports in driving a stable, high impedance headphone and improve sound quality to resist noise such as wind, engine noise during high-speed riding. Equipped with BT 5.0+, It has high compatibility and stability. 40MM bass can be connected to two mobile phones at the same time. Motorcycle BT headset with noise suppression technology, crystal clear voice quality is guaranteed at a high speed. You will not miss any communication. Suitable for most half-face helmets which can cover ears. Model: BT18 BT: 5.0 Lithium battery: 3.7V/1000mAh Charging voltage: 5V Mobile phone connection distance: 30-40 meters Working hours: about 40 hours Colour:Golden Material:ABS Size: 230 x 110 x 37mm Package Contents: 1 x Helmet headset 2 x USB Cable 1 x Handlebar controller 1 x MIC and Trumpets 1 x English manual Only the above package content, other products are not included. Note: Light 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.