The M6 tactical light/laser unit has earned an impressive reputation for rugged, reliable service from its many satisfied end users. It features a slide lock mounting system, halogen bulb with a peak output of 90 lumens of white light, bright red aiming laser, interchangeable back plate and a run time of 1 hour. There are 4 different activation modes to choose from: Illuminator Only, Laser Only, Both and Off. Powered by two 123A lithium batteries (included). Limited lifetime warranty.