The multi-mode, True White LED flashlight from Leupold & Stevens Inc. lasts up to 64 hours and includes both an emergency S.O.S. and high-intensity strobe function. The True White LED delivers an extremely bright, pure white beam of light with precision reflectors that maximize brightness while tightly focusing the beam. MX-431 Flashlights have a high-intensity strobe function with 175-lumen output that delivers a blinding flash that can help officers gain the seconds needed to take control of potentially dangerous situations. The MX-431 incorporates a durable, scratch-resistant sapphire window, one of the hardest man-made substances on Earth. As part of our totally modular MX system, you can change out the components of the MX-431 with any of the company's Maintubes and Bezels to create alternate flashlight combinations. Runs on three CR-123A batteries.