Note This is a Dynamo bike light and should be used with a Dynamo. It should not be used in electric bikes, it will burn them out. Advantages of the headlights: 1. Use: Dynamo bike fork headlight 2. With the bike reflector, ensure safety when the dynamo bike headlight is without power. With parking light/steady light function, cycling for 5 minutes, then even if you stop cycling, the dynamo taillight bike can work in 3 minutes Power: 3W. Input: AC6V Material: Plastic, light weight Switch: with ON/OFF button Color: Black Package Contents: 1 x Bike Headlight Only the above package content, other products are not included. Note: Light shooting 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 +/- 1-3 cm.