Citizen Eco-Drive Men's Navihawk A-T Watch. This Eco-Drive watch is powered by light, and features atomic timekeeping with radio control. Features a 48mm stainless steel case and mesh bracelet with black dial. Has a perpetual calendar, 1/100 second chronograph, power reserve indicator and day/date comes with anti-reflective mineral crystal. The navihawk features atomic clock synchronization and receives automatic radio signals on three continents.