The ProTac series expands into weapon-mounted lights with this 350 lumen light featuring a dedicated fixed-mount for Picatinny rails. It uses either a remote switch with momentary/constant on operation or a standard push-button tail switch, and can run on either a lithium battery or an easy-to-find alkaline battery. Dual fuel - uses one AA alkaline or CR123A lithium battery (both included); also accepts AA lithium. CR123A lithium battery output: high and low. High: 350 lumens; 12,000 candela; 219m beam; runs 1.75 hours. Low 40 lumens; 1,380 candela; 19m beam; runs 14.5 hours. AA alkaline/AA lithium battery output: high and low. High: 150 lumens; 4,950 candela; 141m beam; runs 1.5 hours (alkaline); runs 4.5 hours (AA lithium). Low: 40 lumens; 1,380 candela; 19m beam; runs 8 hours (alkaline); runs 14 hours (AA lithium). Strobe for signaling or disorienting. TEN-TAP Programming - choice of three operating modes: high/strobe; high only; low/high. Remote pressure switch features momentary and "constant on" operation. Integrated rail clamp attaches to MIL-STD-1913 rails. Easy to attach, secure mounting. Includes remote pressure switch, push-button tail switch, remote retaining clips, double-sided tape and zip ties. Durable, anodized aluminum construction with impact-resistant tempered glass lens. IPX7 rated with the Standard button switch installed; waterproof to 1 meter for 30 minutes. IPX4 rated with the Remote Pressure Switch installed. Operating temperature: -40 to +120 Degree Fahrenheit. Limited lifetime warranty. RoHS compliant.