The Bushnell 4×20 Bone Collector LRF Range Finder w/ 9-Volt Battery & Case is a great companion to have along on your hunts for clear range readings and increase accuracy. This range finder from the experts at Bushnell gives lightning-fast readings and is rainproof, so wet conditions aren’t a problem. The Bushnell 4×20 Bone Collector Rainproof Range Finder uses an eye-safe infrared laser to measure distances out to as much as 600 yards with an accuracy of ±1 yard. The Bushnell 4×20 Bone Collector Range Finder comes with a single pushbutton operation for simple and easy to use in all weather.