The Smith & Wesson Delta Force LED Tactical Flashlight operates on two CR123 lithium batteries. For easy use and comfortable carrying, a holster is included. It has 204 lumens with a runtime of two hours and 58 minutes. The beam will go a distance of 204.4 meters. Waterproof to 1 meter and extreme-weather and impact resistant, this Smith & Wesson flashlight is ideal for frequent rough use. It is ANSI FL1 certified for quality. Use it to ensure you have some light when you need it. The waterproof flashlight holds up against the outdoor elements, making it a good choice for hiking, camping and much more. Keep it with your tactical gear, in the car or at home so that you can be prepared for those emergency situations.