Laserguard Pro compatible with Glock Full-Size and Compact pistols is a powerful red laser sight and 150 Lumen LED white light in a single compact unit. This illumination and targeting product is activated with Crimson Trace's famed Instinctive Activation, which activates the unit via a front activation button when the pistol is held in a normal firing grip. The LL-807 features four modes of operation (see below), a Master On/Off Switch, is completely user-installed in moments with no modifications to the gun frame and the laser is user-adjustable for windage and elevation. Offers 2 hours of battery with a single CR2 Lithium battery. *Compatible w/Glock Gen3 17/17L/19/22/23/24/25/31/32/34/35/37/38. Gen4 17/19/22/23/31/32/34/35/37. Gen5 17/19/19X/45.