Leupold RX-850i TBR with DNA Digital Laser Rangefinder, Black/Grey 100% waterproof and fog proof: absolute waterproof and fog proof integrity  each is ready for a lifetime in the field, in all conditions 6x magnification gives you plenty of power while maintaining a wide field of view to track game on the move The durable aluminum housing is shrouded in a rubber armor coating that provides a positive grasp The RX series rangefinders have a built-in inclinometer with TBR that can calculate the ballistic range to your target, then display it as a holdover aim point, an MOA adjustment, a Milliradian adjustment, or the equivalent horizontal distance Powered by the readily available CR2 lithium camera battery, the RX-Rangefinders with DNA feature a convenient battery power indicator