NcSTAR Gen3 Pistol Handgun Green Laser With Strobe Feature & Picatinny MountPistol Green Laser with Strobe feature, Picatinny Mount Electronic Control Buttons are completely Ambidextrous there are three buttons on each side of the Pistol Laser body. There is a Momentary button on top, Constant On Off button on the bottom, and the Laser Strobe button is at the front. Momentary & Constant On Off buttons are positioned and angled ergonomically. They are accessible from your Trigger Finger or your support hand thumb when gripping