Using the Garmin Xero A1i Digital Bow Sight is easy. First, install 2 lithium AAA batteries. Mount the silent button trigger in a location that suits your grip. When you're ready to take a shot, press the button to activate the laser range finder. It will quickly give you the angle - compensated distance to your target. Choose your preferred pin color (red or green) and arrow profile for different hunting scenarios. The LED pins will show you the aim point, and they'll adjust their brightness automatically according to the light conditions. To use the Laser Locate™ feature, pair it with a compatible Garmin GPS device. Remember to keep the sight clean. Wipe the glass lens with a soft, clean cloth. The target - side lens has an anti - reflective, water - repellant coating, so be gentle. Store the sight in a dry place, and avoid extreme temperatures outside the operating range of - 20C (- 4F) to 60C (140F). Check the battery level regularly, and replace the batteries when needed to ensure you never miss a shot during hunting or practice.