With 400 lumens of vibrant white light, our WML Series is constant, momentary and strobe. Extensively tested for emitters provide up to 1.5 hours of runtime in white mode, or 4 hours in infrared mode. MIL-STD-810G certified, this 3-ounce weapon light's concentrated, high-intensity beam fills your field of view for close to mid-range target identification. With just a flip of the lever, instantaneously switch between white or infrared mode. In addition, the easy-to-operate lockout system ensures the light isn't activated until you're ready. The all-inclusive rail clamping design integrates seamlessly with your weapon, providing simple, fast mounting with no need for Mfg: Inforce-Mil SPECS: Batteries- 1 Lithium 123A included, head removes for battery replacement.