The Crimson Trace CMR-207 Rail Master Pro offers a powerful 400 Lumen LED white light and aiming laser in a compact and durable unit. The CMR-207 features an aluminum body with ambidextrous activation points. User programmable modes of operation include: Laser + Light, Laser Only, Light Only. This Rail Master Pro features smart electronics that will power down the unit after 5 minutes, (preventing battery drain if activated during casing or holstering). Laser sight is fully user adjustable for windage and elevation and attaches to most handguns with a picatinny rail. Powered by a single CR123A Lithium battery.