Features: grey ip stainless steel case grey ip stainless steel bracelet eco-drive movement caliber: e660 sapphire crystal black dial analog display chronograph function power reserve perpetual calendar radio controlled flying distance navigation calculations world time alarm 12/24 hours display overcharge prevention function insufficient charge warning function luminous hands and markers day and date display uni-directional rotating bezel screw down crown solid case back deployment clasp 200m water resistance approximate case diameter: 46mm approximate case thickness: 14mm