ProTac 2AA The combination of small size and C4 LED output results in one of the brightest tactical personal carry lights for its size. High, low and strobe modes. C4 LED illumination output and run times: HIGH - 120 lumens/1.25 Hour LOW - 14 lumens/21 Hours STROBE - 4 Hours. Solid State power regulation provides maximum light output throughout battery life. Rubber push button tail cap switch. IPX7 rated design; waterproof to 1 meter for 30 minutes. Impact-resistant tempered glass lens. Unbreakable pocket clip. Anti-roll head. Includes nylon holster. Includes 1 AA alkaline battery.