This handy pocket-size light is a versatile companion in a wide range of everyday indoor and outdoor tasks. Powered by two CR123 batteries (3 V lithium) or a 18650 rechargeable Li-ion battery, it offers four brightness levels (5/40/350/1000 lumens). When a 21700 rechargeable battery is used, the maximum output increases to 1200 lumens. A switch on the rear controls on/off and momentary light. Brightness levels and special modes (strobe and beacon) are activated by the switch on the side. A memory unit ensures that the EFC2 always turns on at the level you most recently used. A signal is given when the available battery capacity falls below 25%. A removable stainless steel clip is provided for convenience. The rugged aluminum housing is hard-anodized and waterproof as per IPX8. Comes with a nylon holster, lanyard, 2 batteries (CR123), battery adapter and replacement seal.