Viridian's E-Series line is specifically designed for everyday concealed carry and is available for the top brands and handguns on the market. The E-Series Green Laser Sights will easily mount to the trigger guard and feature an ambidextrous on/off button with a 5-minute auto shut off just like their Red Sight counterparts.Easy installation onto the trigger guard of your pistolAmbidextrous on/off button with 5 min auto shut offUp to 100 yard range in daylight and 2 miles at nightConstant laser with 60 min battery lifeEasy windage and elevation adjustmentFits the Taurus GX4.