Features:BRIGHTNESS: Features a 5mW peak, 630-670nm, Class 3A visible red laser that is in conformance with and complies with 21 CFR 1040.10 with a max power output of "5mW" for a "Class 3R Red Laser" - the brightest beam allowed by lawVERSATILE: Can be set to SIGHT mode with constant and flashing laser or TRAINER mode depending on desired useEASE OF USE: Ambidextrous push-button activation turns the laser on and off - Auto-off function preserves battery life - User installed, no gunsmithing requiredCOMPATIBLE: Works with all LaserLyte Laser Trainer Targets when used in TRAINER mode with unloaded firearmFITS: Glock 26, 27, 42, and 43