TruGlo Micro-Tac Tactical Micro Laser for Picatinny or Weaver-Style Rail, 520nm Green LaserNext generation, high-efficiency superconductor laser diode. Pulse and constant laser modes. Easy ambidextrous push-button activation for left and right handed users. Recessed on/off buttons eliminate accidental activation. Automatically shuts down after 5 minutes. Mounts to standard Picatinny or Weaver-style rails. Weighs less than 1 ounce. Operating temperature: 14øF (-10øC) to 122øF (50øC). Ultra-compact size is ideal for concealed carry. Two sets of batteries included (1.5V-AG4). Constant and pulse laser modes. Windage and elevation adjustment. Water and shock resistant