An excellent all-around duty light. It uses a 3 watt Luxeon module for brightness that rivals incandescents. The hard aluminum body has a knurled grip for a secure handle. It's also resistant to corrosion and extreme temperatures. The tactile response click tail switch turns it on for constant light or momentary blink. Powered by 3 CR 123 Lithium cell batteries (included). Comes with a Cordura® holster with back-up battery pouch.