Light powered Eco-Drive Caliber E310 Japanese-quartz movement; Charges in natural sunlight or indoor light
Max power reserve: 1 year; Low charge warning: 3 days; Charge time from stop state to max charge: Incandescent Light - 230 hrs, Outdoors, Cloudy (10,000 Lux) - 70 hrs, Outdoors, Sunny (100,000 Lux) - 35 hrs
Durable, hardened mineral crystal; Case diameter: 43.5 mm
Stainless-steel case; Blue dial; Perpetual-calendar, twin date functions
Water-resistant to 330 feet (100 M)