4 5/8" overall. CREE XM-L2 LED. Turbo mode - up to 550 lumen output with up to 1 hour, 15 minute runtime and low mode - 0.1 lumen output with up to 150 hour runtime. Also features: Strobe, SOS, Police Warning Light, and Location Flashing Beacon. Secondary red and blue multi-colored LEDs. 134m beam distance. Uses one RCR123 rechargeable battery, one CR123 battery or one AA battery. Includes black nylon belt holster, detachable pocket clip, AA extension tube, lanyard, spare tail cap button, and spare O-ring. Smart Ring Tactical Series. Specially designed for law enforcement, hunting and tactical applications. Aerospace-grade aluminum alloy construction with anodized black HAIII mil-spec finish. Body is knurled for a sure grip. Features third generation smart selector ring technology which allows for smooth and rapid selection of brightness levels and function by rotating the ring. Unique multi-colored (red, green and blue) tactical / signaling lights. Precision Digital Optics Technology provides extreme reflector performance. Also features: high efficiency circuit board; reverse polarity protection; stainless retaining ring which protects core components from damage; and toughened ultra-clear mineral glass with anti-reflective coating. Waterproof in accordance with IPX-8 (Submersible to two meters). Impact resistant to 1.5 meters. Tail stand capability. Boxed with hanging tab.