Water resistant. Impact resistant. Weapon mountable. Fits Taurus GX4. 100 lumens. Green laser. Batteries replaceable with unit mounted on handgun with no re-sight necessary. Three modes: White light (1h runtime); White light/Red laser (1h runtime); Red laser (11h runtime). Ambidextrous momentary/constant on operation. Windage and elevation screws mounted in bushings. Contoured housing securely attaches to trigger guard. Boxed with hanging tab. May not ship International.