Official Website: www.btulight.com Sizes:207 mm (length) x 52 mm(body width) x106 mm(head diameter) Specifications: 3 Cree XM-L LED (U2) with a lifespan of 50,000 hours Battery: 3 18650 204 mm (length) x 52 mm(body width) x106 mm(head diameter) 1200-gram weight (excluding batteries) 4 levels of brightness: Turbo (3.8A3)>High(2.2A3)>Med(0.8A3)>Lo(0.05A*3);with mode memory Brigh tness:Turbo(3000lumens)>High(2000lumens)>Med(600lu mens)>Lo(80lumens) Digital Current Regulation Capable of standing up securely on a flat surface to serve as a candle Tail cap click Switch Made of durable aircraft-grade aluminum Super deep Aluminum Alloy Reflector;Shotrange up to 800meters Premium Type III hard-anodized anti-abrasive finish Toughened ultra-clear glass lens with anti-reflective coating With mode memory Notice: Turbo mode will step down to High mode progressively after constant running for 180 seconds to avoid over-heat problem. Accessories: O rings ; Landyard ; Gift Box