The thinnest, smallest, toughest watch Suunto has ever made, the 9 Peak packs 170 hrs. battery life and is made for the peak experiences that sport provides and the adventures you'll treasure forever. Ultra-thin design fits under your jacket sleeve and won't get caught on your pack; improved strap closure with a metal pin is easy to use Measures a svelte 43 x 10.6 mm and weighs just 62 g Built to last, with battery life of 25 hrs. on the best GPS setting (Performance mode), or up to 170 hrs. in Tour mode Suunto intelligent battery technology sends smart reminders based on your activity history to help ensure you're fully charged for your next outing If the watch notices you are running low on battery during an exercise, it will automatically suggest changing to a different battery mode Silicone strap, scratch-resistant sapphire crystal glass and stainless-steel bezel hold up to tough conditions Blood oxygen sensor helps you check your acclimation for high altitude based on a blood oxygen level estimate Catch the Virtual Ghost Runner to practice your pacing or just for fun Enjoy the convenience of over-the-air software updates via the Suunto app, so that your watch always has the latest and greatest software Sport expertise and support for over 80 sports, including running, cycling, swimming, hiking and many more 100 meters of water resistance means you can wear it in the pool; swim functions include pool and open-water pace and distance, automatic intervals and an interval lap table Designed for adventure, with barometric altitude, route navigation on the watch and sport-specific heat maps on the Suunto app (available for iPhone or Android) Integrated wrist-based heart rate tracking eliminates the need for a chest strap (though you can use one for longer activities to save battery power) Connect your watch with your favorite tools and apps to analyze your training, find new routes, get coaching, create 3D videos of your adventures and share with your community Compatible with online sports communities including Strava, TrainingPeaks, Endomondo and more Tracks sleep, including duration and average number of hours Check your incoming calls, messages and notifications with a glance at your watch Includes the full feature set of the Suunto 9 Baro, with no compromises Includes Suunto 9 Peak, charging cable, Quick Guide and manufacturer's warranty leaflet