Features: Powered by two 3-volt CR123 lithium batteries with 10-year storage life Visible illumination source: C4 LED technology, impervious to shock with a 50,000 hour lifetime Infrared illumination source: 850nm LED. Shock-proof with a 20,000 hour lifetime Deep-dish parabolic reflector produces a concentrated beam with optimum peripheral illumination Strobe function with user programmable strobe enable/disable High impact, chemically resistant engineering polymer IR LED Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of muzzle Mounts directly to handguns with Glock-style rails and to all MIL-STD-1913 (Picatinny) rails Includes keys for Glock-style, Picatinny, Beretta 90two, S&W 99 and S&W TSW Machined aluminum sealed construction with black anodized finish Waterproof to one meter for one hour, dustproof Three position mode selector switch (IR Illumination, Safe OFF, Visible Illumination) Double tap of momentary paddle within 0.4 seconds activates strobe Tactile indicator on IR LED housing identifies IR illumination position Highly accurate sight repeatability when remounting Fits existing light bearing holsters Limited lifetime warranty