4Sevens Quark "X" AA&sup2; Tactical LED: CREE XM-L Material: Type-III Hard-anodized Aircraft-grade Aluminum Impact-resistant glass lens with Dual-coating - sapphire coating on the outside and anti-reflective coating on the inside for optimal efficiency and durability. Battery: Two AA Eight output modes: Moonlight, Low, Medium, High, Max, Strobe, SOS, Beacon