AUFO Portable CREE LED XPE 3 Modes Flashlight Pocket Torch Light 150LM with 118650 Battery WATERPROOF RESISTANCE RATING:IPX-6 POWER RESOURCE:1*18650 battery.(Included) MINI SIZE& EASY TAKE:like a size of an ink pen and easy to clip to the pocket. SIMPLY OPERATION: the switch is easy to change in different modes, even with large thumbs. EXCELLENT MATERIAL:the outer casing is sturdy aluminum.