... all bicycle, for the provided holder can Rotate 360 degrees, resizable caliber, simple and easily use.FeaturesBicycle ... one battery bag cushion, one special charger, one 360 degrees Rotate holder.Material: high quality aluminum alloyBulb: ... bicycle, for the provided holder can Rotate 360 degrees, resizable caliber,simple and easily use. ... short of battery, tips charge. LED head lamp or led bicycle light