Reminiscent of CITIZEN®'s first Eco-Drive radio controlled analog world timer, the Chrono Time A-T now in its second generation, redefines atomic timekeeping with atomic clock synchronization for superior accuracy with world time in 26 cities. In a stainless steel case and bracelet with grey dial, the Chrono Time A-T features UTC alarm, 1/5-second chronograph, perpetual calendar, power reserve meter, sapphire crystal and date. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number H610.