Aimshot Ultralight Trigger Guard Mounted Laser for Ruger LCPII is water resistant, strong, lightweight and made of durable nylon reinforced with carbon fiber weighing only .73oz. It’s compatible for ambidextrous safety. The laser has a 650nM wavelength with <5mW output power and runs on a 1 CR1/3N battery or 2 LR44 batteries with 2 hours continuous usage. Fits Ruger LCPII.