2.15” overall. Water resistant. Impact resistant. Strobe. Pack weight: 2.4oz. For full size and compact railed handguns. 500 lumens. 1.5 hour runtime. 131m beam distance. Machined aluminum construction. Ambidextrous operation. Safe off feature. Includes key kit to securely fit a broad range of weapons. Fast and adjustable secure side mounting. Operating temperature range: -40F to 120F. Requires (1) CR123A battery (not included). Color: Black. Boxed with hanging tab.