Rextin Super Bright 1200 Lumens Zoomable CREE XM-L T6 Flashlight,18650 Rechargeable Battery Or AAA battery Adjustable Flashlight Torch for Camping, Hiking and Other Outdoor & Indoor Activities Reverse polarity protection:protect the LED light do not burn out if the battery installed backwards 5 switch modes: high / medium / low / strobe / SOS Support zoom in, zoom out function with adjustable focus. Super mini size, bright, blinding effect Power Source: 1 x 3.7V 18650 4200mAh Battery or 3x AAA battery Skid-proof and waterproof design, best suitable for Outdoor Hiking, Camping, Climbing, Cycling, etc