Brightness Modes: Semi- Full- Strobe- SOS Use CREE XM-L2 U3 LED Duration: 6 hours for semi brightness, lifespan above 1000,000 hours Max brightness: 960lm, Max beam distance: 260m 123g( excluding battery); 1.5m anti-drop function USB common charging interface with intelligent charging circuit, Effectively prevent overcharge and over discharge Constant current drive circuit, brightness constant, with memory function; anti-reverse circuit Low power warning function, boot power less than 10%, red light flash, prompt for timely charging Aviation grade aluminum alloy material; mirror aluminum alloy cup Head use 304 stainless steel cover protection; tail inverted function Dimensions: 138mm(length)x25 mm(body diameter)x32mm(head deiameter) Military grade III hard anodized finish