Features white LED and green laser. 500 lumens; 140m beam; runs 1.5 hours (light only or light/laser combo). Laser only runs 11 hours. Ambidextrous on/off rear switch in either a low or high option. TLR-8G side switch model cannot be retrofitted to the TLR-8A G 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. 2.58 (6.55 cm); 2.64 oz.