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 law VERSATILE: Can be set to SIGHT mode with constant and flashing laser or TRAINER mode depending on desired use EASE OF USE: Ambidextrous push-button activation turns the laser on and off - Auto-off function preserves battery life - User installed no gunsmithing required COMPATIBLE: Works with all LaserLyte Laser Trainer Targets when used in TRAINER mode with unloaded firearm FITS: Glock 26 27 42 and 43