Features and Benefits: 300 lumens and 2.5 hour runtime; Green laser visible in daylight and burns brightly in extreme temperatures; Accepts two CR123A lithium batteries for optimal performance in cold temperatures; Powerful beam with extensive range and good peripheral all-around coverage; Mounts directly to handguns with Glock-style rails and to all Picatinny rails; IPX4 rated for water resistance; Strobe function can be enabled/disabled;