Strobe. Fits GLOCK 43Xmos/48mos and 43Xrail/48rail subcompact handguns with slim mounting rails. Ergonomic rear switch. Ambidextrous operation. Safe off feature. Mounting kit with key included. Secure side mounting. Waterproof. 500 lumens with 1.5 hour runtime. Requires (1) CR123A battery (included). Aluminum construction. Color: Black. Boxed with hanging tab. May not ship Post Office or International.