Important Information
- Price — 250$ *average Amazon Price, we may earn commission from purchases
- Year of first Release — 2010
- Module Number — 5089
- Battery Type — Solar (Edifice Batteries)
ECW-M300 Model Range *may be updated
ECW-M300-1A 
ECW-M300EDB-1A
The most distinctive specs of ECW-M300 *Editorial
— 100-meter water resistance (good for swimming but not for deep diving)
— Tough Solar (CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power)
— Radio-controlled Watch; Multi band 6 (additional way for time sync. This watch receives time calibration radio signals that keep the displayed time accurate)
— Stopwatch function – 24 hours (Measures with an accuracy of seconds the meantime and the end time. The measuring capacity reaches up to 24 hours)
Official ECW-M300 Specs / Features *for base version ECW-M300-1A
- 1/100-second stopwatch
- Measuring capacity: 23’59.99″
- Measuring modes: Elapsed time, split time
- Accuracy: ±15 seconds per month (with no signal calibration)
- Approx. battery operating time
- 5 months on Rechargeable Battery (Operating period with normal use without exposure to light after charge)
- 23 months on Rechargeable Battery (Operating period when stored in total darkness with the Power Save function ON after full charge)
- Full auto-calendar (to year 2099)
- Daily alarm
- Low battery alert
- Power Saving
- Regular timekeeping
- Analog: 3 hands (Hour, minute, (hand moves every 10 seconds), second), 3 dials (24-hour, world time hour and minute, day), date
- Solar powered
- 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 State)
- 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
- Time calibration signal reception
- Auto receive up to six* times a day (Remaining auto receives canceled as soon as one is successful)
- Manual received
- Last time received display
- *5 times a day for the Chinese calibration signal
- World Time
- 29 time zones (29 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping
- Size of case / total weight
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