SureFire G2X Fire Rescue Pro Helmet Mount Kit Dual-Output LED and Helmet Mount Virtually indestructible LED emitter regulated to maximize light output and runtime Two output levels-high for maximum light, low for extended runtime Special high-temperature polycarbonate window resists impact, extreme heat Tough, lightweight fluorescent orange Nitro Lon body Dual-output tail cap click switch-press for momentary-on low, click for constant-on low, return to off then press or click again for high