Explicitly designed for police use, the TFC1 differs in several details from flashlights for everyday indoor and outdoor applications. For one thing, the strobe mode can be activated without any delay when the flashlight is off. For another, both switches (main switch for on/off and momentary light, secondary switch for strobe and brightness ) are located at the end for intuitive operation. Powered by two CR123 batteries (3 V lithium), it offers four brightness levels (5/50/300/1000 lumens); using a 18650 rechargeable Li-ion battery, the maximum output increases to 1400 lumens and with a 21700 rechargeable battery the maximum output increases again to 1500 lumens. A memory unit ensures that the TFC1 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 and can be replaced by a tactical ring (also included). The rugged aluminum housing is hard-anodized and waterproof as per IPX8. Comes with a nylon holster, tactical ring, lanyard, 2 batteries (CR123), battery adapter, and replacement seal. Two remote switches (long and short) are available as optional accessories.