Crimson Trace's CMR-204 Rail Master Pro provides both target identification and acquisition. It features a high visibility green laser paired with a 100-lunem light, and can run for 2 continuous hours on a single CR2 lithium battery. The CMR-204 Rail Master offers 4 selectable modes: Laser/Light Constant On, Laser Constant On, Light Constant On, and Laser w/Light Dazzler. Tap-on/tap-off controls provide instant activation, and a programmed Auto Shut Off after five minutes helps conserve battery life. Additionally, the CMR-204 Rail Master excels at handgun applications, but is also well suited for rifles and shotguns outfitted with M1913 Picatinny rails. Features: High-visibility green laser / 100 lumen white light combination4 selectable modes: Laser/Light Constant On, Laser Constant On, Light Constant On, and Laser w/Light DazzlerTap-on/tap-off controls2-hour run time Crimson Trace CMR-204 Rail Master Pro Universal Green Laser Sight w/White Tactical Light 01-4200-1