"Multi-Band Atomic Timekeeping (US, UK, Germany, Japan) 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, Germany DCF77, Japan JJY40/JJY60 Frequency: US 60kHz, UK 60kHz, Germany 77.5kHz, Japan 40/60kHz Tough Solar Power Shock Resistant 200M Water Resistant Auto EL Backlight with Afterglow World Time: 29 times zones (48 cities), city code display, Daylight saving on/off 5 Daily Alarms (1 with snooze) Countdown Timer Measuring unit: 1/10 second Countdown range: 1 minute to 60 minutes 1/100 second stopwatch Measuring capacity: 999:59'59.99"" Measuring modes: Elapsed time, split time, 1st-2nd place times Hourly Time Signal Auto Calendar (pre-programmed until the year 2099) 12/24 Hour Formats Accuracy: ±15 seconds per month (with no signal calibration) Storage Battery CTL1616 Battery Power Indicator Power Saving Function Approx. battery life: 9 months on full charge (without further exposure to light) Module 3061 Size of case/total weight: GW800 51.5 x 42.5 x 13.9mm / 56g"