Power: 1W. Input voltage: DC 4.5V special light output Material: metal shell,high quality bike light. No batteries in the package. Sturdy High Quality Durable Metal body, Black Color Shell. high grade Bright 1 LED headlight, retro look. Special lens provides optimum light output. with white LED. Especially suitable for riding at night. Left and right button switch, easy to install. The bracket are installed in the front brake or fork hole of fixed cog. It can't be install if your bike have former shelf. Power supply by 3X AAA batteries (The batteries Not included). LED light specification: diameter: about 8cm, Length: about 11cm. Retro Classic vintage style, Well-designed,Make your bicycle unique.Riding at night brings you safety. our bike headlight makes you perfectly visible at night and offers excellent protection on the road. Advantages: 1.High power 180 ,bright enough for city cycling 2.Wide voltage input: fits most ebike. How to install: 1.Use screw to install the light mount on the bike 2.Load the DC batteries of three 1.5V. Packing size: 20*20*10cm Color: black Package Contents: 1* light(without Battery) 1* Bracket Notice: The red wire is positive pole,and the black wire is negative pole. The output voltage should be 4.5V,or the light can't work 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.