1. beam angle 320 degrees, different direction can see the electric bicycle tail light. 2. Wide input voltage: fits most e-bikes. 3. With E9 certified reflectors, when no for the ebike tail light, it can still use as a rear light. advantages: 1. Worry cyclist can be seen. 2. Can install on most ebike rear Rack, the two screw size is 50mm. : 0.6W, very powerful electric bicycle tail light. Input: DC6V-60V Cable length: 95 cm Two installation screw spacing: 50mm IPX5 waterproof, heavy rain waterproof Colour:Black + Red Material:plastic Size:122x49x65mm Package Contents: 1 x Bike Tail Light 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.