Callaway 8396 X-Hot Golf GPSRangefinderbr Click below to buy on Amazon: br Capable of distancing targets in succession for up to 8 seconds by pressing just one button br Compact waterproof and fog proof br Focusing diopter by simple twisting action on the eyepiece br New in-round case design with rubberized no slip grip material br CR2 Lithium battery lasts approx 10K ranging sessions