Features: black ip stainless steel case leather strap eco-drive movement caliber: f150 sapphire crystal blue dial analog display power reserve satellite timekeeping system gps world time (20 cities) summer time (on/off) light level indicator insufficient charge warning function overcharge prevention function luminous hands and markers day and date display screw down crown solid case back buckle clasp 200m water resistance approximate case diameter: 44mm approximate case thickness: 15mm