With 7 days in a week, this Fenix 7X Sapphire Solar Black DLC Titanium Smartwatch is designed to last for all of them, no matter how many challenges you face. With its long-lasting battery this smartwatch can sustain even the most athletic lifestyles. At A Glance  Presented on a black silicon strap with pin buckle 51mm polymer case with a water resistance of 100m Long-running solar powered multisport GPS watch with scratch-resistant Power Sapphire™ lens and always-on 1.4” display uses the sun’s energy to extend battery life; a built-in LED flashlight keeps you going after dark Trusted button controls that work in any environment are matched with a highly responsive touchscreen interface for quick, convenient access to selections Take your training to the next level with endurance and real-time stamina tracking, training status, advanced performance metrics and 30+ built-in sports apps Get 24/7 health and wellness monitoring with wrist-based heart rate, Pulse Ox4, stress and enhanced sleep tracking Navigate the outdoors with a higher level of positioning accuracy, thanks to new multi-band frequency and GNSS network support (GPS, GLONASS and Galileo) plus built-in sensors for 3-axis compass, gyroscope and barometric altimeter Find freedom and adventure with preloaded TopoActive maps — plus maps for thousands of golf courses and ski resorts worldwide Built-in Wi-Fi® connectivity lets you download maps for any continent at any time — without using a computer Enjoy everyday style with access to smart notifications, music storage and our Garmin Pay™ contactless payment solution Battery performance: up to 28 days of battery life while indoors or up to 37 days when solar charging in smartwatch mode; in GPS mode, up to 96 hours no solar charging or up to 135 hours when solar charging Powered by a quartz movement