Garmin Enduro™ 3 – 51 mm, Solar, Sapphire, Ultraperformance GPS Smartwatch, Extreme Battery Life, Detailed Mapping, Built-in LED Flashlight, Carbon Gray DLC Titanium with Black UltraFit Nylon StrapUp to 90 days of battery life in smartwatch mode (assumes all day wear with 3 hours per day outside in 50,000 lux conditions) and 320 hours in GPS mode with solar charging (assumes continuous use for entire period in 50,000 lux conditions) all with an always on display, so youre ready to take on the toughest challenges Preloaded TopoActive maps are optimized for outdoor activities to help keep your adventures on track Dynamic round trip routing allows