Streamlight ProTac LED 1AA Professional Tactical Flashlight, Black: * Light Source: C4 LED, 50,000 hour lifetime * Lens: Glass lens, O-ring sealed * Battery: One AA alkaline battery * On/Off: Multi-function, push-button tactical tailswitch. 1-handed operation of momentary or variable intensity mode * LED solid state power regulation provides maximum light output throughout battery life * IP X7 rated design; waterproof to 1 meter for 30 minutes * Anti-roll facecap * Removable pocket clip * Serialized for positive identification