... caliber, simple and easily use.FeaturesBicycle light name headlight + bicycle lightAccessories: one bicycle light, one special 4* 18650 battery,one PU PVC ... required (such as patrol,tracking, spot inspection, Security, first aid a t sea and so on), outdoor activity (climbing, camping, ... the battery.Please charge in the safe place.Do not remove the battery cellOptionally, so as not to influence the ...