Smart Ring Tactical Series. 4 5/8" overall. CREE XM-L2 LED. Turbo mode - up to 550 lumen output with up 45 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 (batteries not included). Includes black nylon belt holster, detachable pocket clip, AA extension tube, lanyard, spare tail cap button, and spare O-ring. Specially designed for law enforcement, hunting and tactical applications. Aerospace-grade aluminum alloy construction with anodized gray 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 and blue) tactical / signaling lights. Precision Digital Optics Tech