Features white LED and 640-660nm red laser. 500 lumens; 140m beam; runs 1.5 hours (light only or light/laser combo). Laser only runs 18 hours. Ambidextrous on/off rear switch in two configurations – low or high, to match your style. TLR-8 side switch model cannot be retrofitted to the TLR-8A rear switch models. Uses one CR123A lithium battery (included). Safe off feature on bezel prevents accidental activation; saves batteries. Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of muzzle. Durable, anodized machined aluminum construction. User enabled strobe function. Operating temperature: -20°F to +120°F.