The TLR RM 1 features independently operating push-button and remote pressure switches to provide the security of knowing you'll always have light. Packaged as a kit offering everything you need to mount to your long gun. Features: 500 lumens; 140 m beam; runs 1.5 hours; runs 3 hours on strobe Features independently operating push-button switch or remote pressure switch Remote pressure switch exits at 90deg providing improved wire routing option while preserving rail space Safe off feature prevents accidental activation; saves batteries Engineered optic produces a concentrated beam with optimum peripheral illumination Securely attaches to long guns with MIL Standard 1913 Rails Packaged as a kit offering everything you need to mount to your long gun (remote pressure switch kit, key kit) Powered by one CR123A lithium battery (included) IPX7; waterproof to 1m for 30 minutes 3.2? (8.12 cm); 2.74 oz. (77.9 g)