fenix 7S – Sapphire Solar Edition GO LONGER. GET STRONGER. SEVEN DAYS A WEEK. Meet any athletic or outdoor challenge with the rugged fenix 7S Sapphire Solar multisport GPS watch. It’s styled for smaller-sized wrists, and 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. - Get a battery boost from the sunlight, so you can go longer between charges. - Do more. Charge less. Solar charging yields up to 14 days of battery life in smartwatch mode3. - How is your body holding up? Wrist-based heart rate1 and Pulse Ox2 will let you know. - Need a running coach that knows the terrain? Check out the PacePro™ feature. - Navigate with preloaded TopoActive Europe maps and use built-in Wi-Fi® for easy updates.