Casio Blue Waveceptor - Metal Band - Atomic Timekeeping

*Atomic Timekeeping: Receives time calibration radio signals which keep the displayed time accurate Time calibration signal reception Auto receive function (four times per day) Manual receive function Signal: WWVB, Frequency: 60kHz Analog digital combination 50 meter water resistant Electro-luminescent backlight with afterglow World time: 29 time zones, 30 cities Daylight savings time auto/on/off Date alert Display flashes when set date is reached 1/100 second stopwatch Measuring capacity: 99:59"™59.99"� Measuring mode: elapsed time, split/lap time, 1st-2nd place times 4 daily alarms and 1 snooze alarm Hourly time signal Auto-calendar (pre-programmed until the year 2099) 12/24-hour format Accuracy:: +/-20 seconds per month(with no signal reception) Approximate Battery Life: 2 years on CR1620 Module 3747 *See manual for reception advice, including ideal conditions and interference factors.