The watch is powered by a Seiko solar-powered caliber 8B92 (radio-controlled) quartz movement that recharges when exposed to light. It automatically receives radio signals to precisely adjust the time and calendar. It has a 6 month power reserve when fully charged (no need for battery changes). The chronograph measures up to 60 minutes in 1/5 of second increments with split time measurements. The watch also features world time in 25 time zones