The PT 1AA combines compact size and C4 LED technology to bring you one of the brightest tactical personal carry lights for its size. Its aircraft aluminum body features an impact-resistant tempered glass lens and anti-roll head. Multi-function, push-button tactical tailcap switch offers one-handed operation: press for momentary-on, click for constant-on, or press two times rapidly for strobe activation. Solid state power regulation provides maximum light output throughout battery life. IPX7 rated for waterproof operation up to 1 meter for 30 minutes. Includes nylon holster and unbreakable pocket clip. Operates on one AA alkaline battery (included). Lighting output: 50 lumens (high setting), 6 lumens (low setting). Runtime: 1.75 hrs. (high setting), 22 hrs. (low setting), 4 hrs. (strobe setting).