Viridian’s E SERIES laser sight is specifically designed for the everyday conceal and carry owner. This model specific, trigger guard mounted, laser sight offers the most powerful red laser legally available, delivering rapid target acquisition when you need it most. Easy installation onto the trigger guard of your pistol. Ambidextrous on/off button with 5 min auto shut off. 25 yard range in daylight and 1 mile at night. Constant laser with 6 + hours battery life. Easy windage and elevation adjustment. Fits the Taurus TCP. LED Light Color: Red. Life (constant): 6 Hours. Material: High Strength Thermo Molded Polymer. Range: Up to 25 yards daylight / 1 mile night. Assembly Notice: You have to unscrew the laser into two separate pieces and then reassemble over the trigger guard & rail at the same time. Simply sliding the light/laser on the rail is the improper way to install.