Specification 45mm Model 50mm Model Display Type AMOLED, non-touch AMOLED, non-touch Display Size 0.9 inches 1.1 inches Battery Life - Smartwatch Mode: Up to 24 days - GPS Mode: Up to 30 hours (up to 70 hours with solar) - Smartwatch Mode: Up to 35 days - GPS Mode: Up to 45 hours (up to 110 hours with solar) Water Rating 10 ATM (100 meters) 10 ATM (100 meters) Operating Temp Range -20º to 60ºC (-4º to 140ºF) -20º to 60ºC (-4º to 140ºF) Weight 52 grams 57 grams Case Material Fiber-reinforced polymer with metal-reinforced bezel Fiber-reinforced polymer with metal-reinforced bezel Built-in Flashlight Yes Yes GPS Multi-band GPS with SatIQ™ technology Multi-band GPS with SatIQ™ technology Health Features Heart rate, Pulse Ox, sleep tracking, HRV status Heart rate, Pulse Ox, sleep tracking, HRV status Battery life estimates for solar models assume 3 hours of daily outdoor use in 50,000 lux sunlight conditions.
