There's No Other Bow Sight Like It Auto-ranging digital bow sight automatically measures distance to the target and provides an LED pin for the shot. Dual-color LED pins allow you to clearly see your target, unobstructed by physical pins. Silent single-button trigger requires minimal movement; lets you range at rest or full draw up to 100 yards on game or up to 300 yards on reflective targets. Customizable for single-pin and multi-pin configurations or manual pin selection. Laser Locate feature enables use of a compatible Garmin GPS device to know exactly where the target was located when the shot or range was taken. 1 year of battery life with 2 lithium AAA batteries (not included). Range, Sight and Shoot the Exact Pin: Know the range, and shoot the exact pin with minimal movement using Xero bow sights. They're the first bow-mounted digital laser range finders and targeting display systems that measure the angle-compensated distance to your target and provide an LED pin for the shot even on those in-between yardages. LED pins automatically adjust brightness to conditions and allow you to see your target, unobstructed by physical pins. A single-button trigger lets you range at rest or full draw to game up to 100 yards away or to reflective targets up to 300 yards. Both Xero A1 and A1i are customizable for single-pin and multi-pin configurations or manual pin selection. All-in-one Design: Xero bow sights mount directly to your bow, providing a highly accurate laser range finder that calculates the exact LED pin to use for the shot. Theres no need to fumble with a separate range finder or guess which pin to use. Laser Range Finder: No more guessing about yardages in between pins. Xero A1 and A1i bow sights instantly provide the precise angle-compensated distance to game up to 100 yards away or up to 300 yards on reflective targets, at rest or full draw. LED Pins: The beauty of using bright LED pins is that you can clearly see them over your target, unobstructed by physical pins. Xero A1 utilizes red LEDs while A1i gives you the option to use red or green LEDs. Silent Button Trigger: When stealth and stillness are critical, Xero bow sights require minimal movement, at rest or full draw. You mount the button in the most convenient location for your grip so that 1 finger can silently trigger the laser range finder to give you the distance and exact pin you need for the shot. Customizable Pins: You can customize your Xero bow sight for single-pin and multi-pin configurations, or if you have certain favorite yardages, you can specify manual pin selections. Easily toggle between fixed pin mode and single-pin mode. Laser Locate Feature: Use Xero A1i along with companion Garmin GPS devices (sold separately) to track game or find arrows to show you exactly where the target was located when the shot or range was taken. That way, you can go directly to that specific spot to begin your search. Multiple Arrow Profiles: Xero A1i allows you to save pin settings for various bow configurations. Save settings for various draw weights, arrow weights and tips. Easily change between fast arrows for 3-D and heavier arrows for hunting. Shot Dynamics: The Xero A1i bow sight includes additional information that can help improve archer performance. View data such as bow level at release, bow impulse duration and more.