Meet any athletic or outdoor challenge with the rugged fenix 7 Sapphire Solar multisport GPS watch. Its scratch-resistant Power Sapphire™ solar charging lens uses the sun’s energy to extend battery life — powering advanced training features, sports apps, health and wellness monitoring sensors and more. Features: Get a battery boost from the sunlight, so you can go longer between charges. Do more. Charge less. Solar charging yields up to 22 days of battery life in smartwatch mode3. How is your body holding up? Wrist-based heart rate1 and Pulse Ox2 will let you know.