This rangefinder mounts securely to your bow and has a remote pressure switch that you place on the grip to give you readings while you are aiming. The back features easy to read LED numerals that display the range in yards, just inches above your sight. A class 1 and 3R eye-safe IR laser delivers both continuous and spot readings from 10 to 70 yards, which are automatically compensated for angle. A visible alignment laser is built-in, and lets you align the top pin of your sight for optimal performance in the field. Powered by one CR2 battery, an indicator comes on when power levels reach one quarter.