Ambidextrous momentary/steady on/off switch; Durable, anodized machined aluminum construction; Includes keys for Glock-style, Picatinny, Beretta 90two, S&W 99 and S&W TSW and Sig P320; Mounts directly to handguns with Glock-style rails and to all MIL-STD-1913 (Picatinny) rails; C4 LED technology, impervious to shock with a 50000 hour lifetime; Rail clamp system securely attaches/detaches quickly and safely with no tools; User programmable strobe can be enabled/disabled; Engineered optic produces a concentrated beam with optimum peripheral illumination; Fits existing light bearing holsters; IPX7 waterproof to 1m for 30 minutes