Bolayu Portable LED Adjustable Zoom 1800LM MINI USB Rechargeable Flashlight Torch Aluminum alloy Imported Rubber Waterproof switch. Mini adjustable focus touch. Suitable for hiking, camping, fishing and many other outdoor activities. Made of aluminum alloy, it is sturdy and durable enough for long time daily using. Built-in 2000mAh rechargeable lithium battery, charged by USB port directly, no power adapter required . Material: Aluminum alloy. Lens material: ABS. Length: 93mm. Head diameter: 27mm. Tail diameter: 24mm.