SAMLITE - LED bat Flashlight, Super Bright Lumens, Water Resistant Super Bright:A constant current circuit chip works to maintain brightness regardless of battery output.Adjustable focus range for different usage, stretching to adjust its focus.Five modes: High / Medium / Low / Strobe / SOS. The aircraft-quality aluminum body has non-slip surface knurling to ensure the light doesnt slip out of your hand Easy Operation:Power switch: press the button at the tail to turn the light on or off. A specially designed diffuser enables the light to be used for campaign, an emergency signal, or a lantern in power outages. Battery Life: Four choices of batteries are available: 1 x 18650 li-ion battery, 2 x CR123, 2 x 16340 li-ion, or 3 x AAA batteries so you will never worry about dead batteries.( kit includes only one 18650 li-ion rechargeable battery ) Quality:High-power Focusing Zoom Flashlight. A Convex Mirrored Reflector and a Focusing Lens are used to change focus from flood to spot by rotating the head of the light. The micrometer-like linear scale on the barrel of light enables you to set the light to precise zoom levels whenever you want. 100% MONEY BACK GUARANTEE!! If You Are Not Completely Satisfied With Our Super Bright Military LED Light within The First Year, SAMLITE Will Replace It with a New One or Refund Your Money Back, No Questions asked!! Our Customers Is Our Priority!!