The bicycle lamp has 4 LEDs and you can adjust the brightness.With simple structure and fixed bracket, it is easy to install.It is suitable for most bicycles with mirror brackets.It is safe for night driving.Item Name: Bicycle LampMaterial: ABSBattery: 2 x AAA Batteries (Not Included)Features: with LEDs, Easy to Install, AdjustableSize: 8cm x 8cm x 8cm or 3.15" x 3.15" x 3.15" (Approx.)Notes:Due to the light and screen setting difference, the itemand 39 s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bicycle Lamp1 x Fixed Bracket1 x Button Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.