Fine Digital Fine Caddie M 100 GPS Range Finder Waterproof Golf Range-Finding Device Sights and Optics Golf Rangefinders (Black). 3D Golf GPS Range Finder, Receive GPS and Russia's Glonass Satellite Simultaneously, Most Precise Slope Calibration Distance, Patented Dog Leg Hole View, High Quality GPS Function (Fast and Precise). Most Detailed Green Information, Precise Hole Awareness, Distance to Front / Center / Back of the Green, Shot Distance Measurement, Easy To Change Pin Location. Provide 40,000 Golf Course Worldwide, Most Convenient Driving Distance Measurement , Able To Wear It On Your Wrist or Hat, Watch-Mode, High Resolution LCD Screen Provides Clear Picture, Long-Lived Battery (Up To 12 hours), Slim and Elaborated Ergonomic Design, USB Update, USB Rechargeable, Waterproof. Display: Mono TFR LCD (128x128), USB: USB Device 2.0 Full Speed, Running Time: 12hrs. (Golf-Mode), Over 3 months (Watch-Mode), Size: 37(W) x 50.5(H) x 10.5(T) mm, Weight: 27g, Gains KC Authentication Mark.