Casio Men s Waveceptor WV58A-1A watch features a 44mm wide and 11mm thick silver and black resin case with function pushers. Casio WV58A-1A is powered by an accurate quartz movement. This multifunctional digital grey dial watch also comes with multi-band atomic timekeeping (US UK): receives time calibration radio signals which keep the displayed time accurate auto receive function (6 times per day) manual receive function signal: US WWVB UK MSF Frequency: US UK 60kHz 50 meters water resistant EL backlight with afterglow World time: 29 times zones (48 cities) city code display daylight saving auto/on/off daily alarm Countdown timer: measuring unit: 1 second countdown setting range: 1 minute to 60 minutes (1-minute increments) 1/100 second digital stopwatch: measuring capacity: 5959.99 measuring modes: elapsed time lap time split time 1st-2nd place times hourly time signal auto calendar (pre-programmed until the year 2099) 12/24 hour formats accuracy: +/-20 seconds per month (with no signal calibration) battery CR1620 approximately battery life: 2 years.