[Helmet light material]The material is PC+ABS, the quality is guaranteed, the design is and waterproof, and the weight is only 0.15kg. [Helmet light parameters]:Battery capacity 2500mAh,Charging interface USB Type-C,Convenient to charge, you can ride for several days on a single charge during daily travel [Motorcycle helmet light]the is a smart helmet light with 164 pcs of ultra-bright LEDs built-in. it could mount to yourown helmet easily,With automatic brake indicator to improve your visibility either day or nightGet more safety on the road! [Easy to install] the launch box installation,the launch box installation in the appropriate location of the motorcycle, according to the instructions to connect the power cable, left and right turn signal lines and brake lights line,One click . [Steering Indication]motorcycle left or right turn switch on, then the helmet lamp corresponding turn signal with the motorcycle turn signal flashing