Casio G-Shock GWM500 Series Mens Watch - Atomic - Tough Solar - Black - 200MKeep track of time on the fly with this G Shock GWM500 series with Atomic timekeeping of 48 world cities. Seen here in black and silver tone with multi band 6 atomic timekeeping and countdown timer. Multi Band Atomic Timekeeping (US, UK, Germany, Japan, China) Receives time calibration radio signals which keep the displayed time accurate Auto receive function (up to 6 times per day up to 5 times per day for China) Manual receive function Signal: US