NIUNIU Be seen while riding your bicycle,this LED light is the solution for night-time safety when biking.br new,high quality,small,lightweight,long life.br Specially designed for the vocational rider or cyclist.br Simple to use,long lasting,and safety attached.br Easy mount and release.installed in seconds before you get ready to ridebr Secure.remains securely lockd in position,even during off-road usebr Durable and water resistant.br Waterproof,shockproofbr 3 Kinds of switchFull light,Fast flash,Flashbr PowerCR2016 batteriesbr Delivery Quantity 2set 10pcsbr Package Contents Only the above package contents, excluding other products. Batteries are not provided.br Size 12.83.5cmbr Reminder The size is measured manually, please allow 1-2 cm measurement errorbr Color Multicolorbr Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.br