POLAR (POLAR (Polar) Polar Grit X (Polar GritX) GPS Mountaineering Outdoor Watch [Japan Genuine Product] Black 90081734 The Polar Grit X outdoor multisport watch combines a durable, lightweight design with the best training features and the ultimate training platform, Polar Flow. The Polar Grit X is equipped with built-in GPS, compass, and altimeter functions. Prepare for your future adventures with Polar's unique smart coaching features. Drive system Lithium polymer rechargeable battery Material Case: Stainless steel Glass: Gorilla Glass Band: Silicone Waterproof 100m Size Case diameter: 47.0mm (length) x 47.0mm (width) Case thickness: 13mm Weight: 64g Model number 90081734 Other [Functions] ■Hill Splitter ・The Hill Splitter function analyzes performance data in detail for uphill and downhill sections on the route. ■FuelWise Nutrition Reminder ・Learn about nutrition to maintain proper energy levels even during long sessions. ■Route Guidance ・Route guidance Simply upload your planned route to Polar Grit X. You can stay on the right track with real-time guidance. ■Plan routes with Komoot ・If you set a route in Komoot and import it to Polar Grit X, you can use the navigation function on the route. ■Advanced wrist-based heart rate measurement function ・Polar Grit X records heart rate with Precision Prime™ heart rate sensor technology*. ■Weather ・You can check the current weather and the weather forecast for the next two days on the watch screen. ■FitSpark Training Guide ・The FitSpark training guide suggests training sessions tailored to your body's recovery status, training history, and daily physical condition. Let's build up your stamina to challenge trails by training moderately every day.