1.Use: It can not only be used for lighting, but also as a birthday gift for children. 2.Use occasions: childrens birthday gifts, rock climbing, walking the corridor, outdoor and so on . Convenient for daily carrying. 3.Instructions for use: Before use, unscrew the small flashlight head, remove the white insulating layer in the film, and twist the lamp head to tighten. Twist the lamp head slightly loose to close it when not in use. 4.Each small flashlight comes with 4 button batteries, model LR41. The battery needs to be replaced separately. 5.This product is unisex, but it is not suitable for children under 3 years old, children should be used under adult supervision. 6pcs Led Keychain Flashlight Mini Flashlight For Outdoor Camping Cycling