This full-size green laser is extremely bright to long distances for target pinpointing. Featuring all aluminum construction, it has a 532nm green laser beam <5mW, set in a specially-designed Weaver-style mount with mounting tool. It is 4.1" L x 1.2" W x 1.5" H, with an on/off cap switch for momentary or constant beam. This green laser includes a coil pressure switch and one CR123A lithium battery.