Lasergrips provide a pinpoint accurate laser each time you naturally grip the firearm, no fumbling for switches or buttons. Installs with no modification. Features windage and elevation adjustment, clear bright beam, weatherproof construction and easy installation. Activation occurs due to pressure applied to the switch located forward of the grip surface (on the front activation switch model). Lasergrips produce a 1/2" dot at 50 feet and are covered by a three year full warranty by the factory. Class IIIa Diode Laser (Non-hazardous to eyes under momentary exposure). The included batteries have a five year shelf life and have a four hour in-use life.