Garmin Enduro 2: multi-sport smartwatch with GPS, solar charging, titanium case and battery life up to 46 days | gagadget.com
Amazon.com: Garmin Enduro, Ultraperformance Multisport GPS Watch with Solar Charging Capabilities, Battery Life Up to 80 Hours in GPS Mode, Carbon Gray DLC Titanium with Black UltraFit Nylon Band : Electronics
Garmin Enduro™ 2 | Multisport Watch for Endurance Athletes