Momentary/Constant 400 Lumen Main Power and Momentary Only Strobe with Fully Ambidextrous Controls Constant On Scalable from 400 to 20 Lumen via Front Facing Lumen Control Pad Impact Resistant Polymer Construction IPX7 Waterproof Rated. Capable of Withstanding Immersion in up to 1 Meter of Water for 30 Minutes 3 Hour Runtime Powered by two CR123A Batteries Low Profile Picatinny Base with Squared Recoil Stop for a Secure Installation