The Patent Pending GripSense Technology utilizes similar technology to smartphones in that the product contains a detection zone in the area that users middle finger indexes the trigger guard of the firearm and senses the user?s grip on the firearm and activates the light or laser instantly. The user has the option to turn off the light or laser with the push of a button or disable the GripSense Activation and rely solely on the button activation. DUAL activation capable with either GripSense? Activation or controlled push button GripSense? Activation does not alter your grip 100 Lumen MINT GREEN light External Battery Access Door with tool-less entry Easily programmable for steady or high-visibilitypulsed laser beam Ambidextrous TAP ON/TAP OFF switch reinforces safe firearm handling GripSense? Technology works with gloves Fully adjustable for windage and elevation