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.