The ultra-compact size of the Micro-Tac Tactical micro laser is ideal for concealed carry, and it fits any weapon with a Picatinny or Weaver-style rail. It features a next generation, high-efficiency semiconductor laser diode, extremely lightweight aluminum construction, and ambidextrous push-buton activation for left and right handed users. It is water- and shock-resistant with operating temperature of 14 to 122 degrees F. The Micro-Tac utilizes constant and pulse laser settings with windage and elevation adjustment, recessed on/off buttons to eliminate accidental activation, and automatic shutdown after 5 minutes. Two (2) sets of batteries (LR626) are included. This model is a powerful 650nm red laser.