With this entry, the ProTac(R)series expands into weapon-mounted lights. Featuring 350-lumen light output, the ProTac comes with 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 an alkaline or lithium battery.Multi-Fuel: Uses one (1) "AAalkaline or CR123A lithium battery (both included); also accepts "AAlithiumCR123A lithium battery output:High: 350 lumens; 219m beam; runs 1.75 hours;12,000 candelaLow 40 lumens; 19m beam; runs 14.5 hours;1,380 candela"AAalkaline / "AAlithium battery output:High: 150 lumens; 141m beam; runs 1.5 hours (alkaline); runs 4.5 hours (lithium);4,950 candelaLow: 40 lumens; 19m beam; runs 8 hours (alkaline); runs 14 hours (lithium);1,380 candela;Strobe for signaling or disorientingTEN-TAP(R)Programming: Choice of three user-selectable programs: 1) high/strobe 2) high only 3) low/highRemote pressure switch features momentary and "constant on" operationIntegrated rail clamp attaches to MIL-STD-1913 rails; easy to attach, secure mountingIncludes remote pressure switch, push-button tail switch, remote retaining clips, double-sided tape and zip tiesDurable, anodized aluminum construction with impact-resistant tempered glass lensIPX7-rated with the Standard button switch installed; waterproof to 1 meter for 30 minutes.IPX4-rated with the Remote Pressure Switch installedOperating temperature: -40degF to +120degFRoHS compliant