Solar powered Time calibration signal reception Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful) *5 times a day for the Chinese calibration signal Manual receive The latest signal reception results Time Calibration Signals Station name: DCF77 (Mainflingen, Germany) Frequency: 77.5 kHz Station name: MSF (Anthorn, England) Frequency: 60.0 kHz Station name: WWVB (Fort Collins, United States) Frequency: 60.0 kHz Station name: JJY (Fukushima, Fukuoka/Saga, Japan) Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga) Station name: BPC (Shangqiu City, Henan Province, China) Frequency: 68.5 kHz The auto hand home position correction World time 29 time zones (29 cities + coordinated universal time), daylight saving on/off, auto daylight saving time (DST) switching, Home city/World time city swapping 1/20-second stopwatch Measuring capacity: 1:59'59.95'' Measuring mode: Elapsed time Other: Auto-repeat Countdown timer Measuring unit: 1 second Countdown range: 120 minutes Countdown start time setting range: 1 to 120 minutes (1-minute increments) Daily alarm Low battery alert Power Saving (hands stop to save power when the watch is left in the dark) Full auto-calendar (to year 2099) Date display Day indicator Regular timekeeping Analog: 3 hands (hour, minute (hand moves every 10 seconds), second) 3 dials (24-hour, world time hour and minute, day), date Accuracy: ±15 seconds per month (with no signal calibration) Approx. battery operating time: 5 months on rechargeable battery (operation period with normal use without exposure to light after full charge) 27 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Size of case : 58.6×53.5×15.5mm Total weight : 188g