LED illuminator and red laser for long range targeting. 100 lumens. 89m beam distance. Three modes of operation: White light (1h runtime), White light/red laser (1h runtime), Red laser only (11h runtime). Ambidextrous operation. Fits most GLOCK railed handguns. Contoured housing securely attaches to rail and trigger guard. Windage and elevation screws mounted in brass brushings. Operating temperature range: -20F to 120F. Batteries replaceable with unit mounted on handgun, no resight necessary (batteries included). Boxed with hanging tab.