Important Information
- Price — 125$ *average Amazon Price, we may earn commission from purchases
- Year of first Release — 2009
- Module Number — 5165
- Battery Type — CR1220 (Edifice Batteries)
EFA-131 Model Range *may be updated
EFA-131D-1A2 EFA-131D-1A4 
EFA-131BK-1A
The most distinctive specs of EFA-131 *Editorial
— 100-meter water resistance (good for swimming but not for deep diving)
— Stopwatch function – 100 hours (Measures with an accuracy of seconds the meantime and the end time. The measuring capacity reaches up to 100 hours)
— Countdown timer (Countdown range: 24 hours)
— World Time (Current time in 48 cities)
Official EFA-131 Specs / Features *for base version EFA-131D-1A4V
- 1/1000-second stopwatch
- Measuring capacity: 99:59’59.999″
- Measuring modes: Elapsed time, lap time, split time,
- Other: Speed (0-498 unit / hour), Selection distance input (0.0-99.9),
- Best lap indicator
- 12/24-hour format
- Accuracy: ±30 seconds per month
- Approx. battery life
- 3 Years on CR1220
- Full auto-calendar (to year 2099)
- Countdown timer
- Measuring unit: 1 second
- Input range: 1 minute to 24 hours(1-minute increments and 1-hour increments)
- Other: Auto-repeat
- Daily alarms
- 5 independent daily alarms (4 one-time alarms and 1 snooze alarm)
- Hourly time signal
- LED light
- Selectable illumination duration, afterglow
- Regular timekeeping
- Analog: 2 hands (Hour, minute (hand moves every 20 seconds))
- Digital: Hour, minutes, seconds, pm, month, date, day
- World Time
- 29 time zones (48 cities + coordinated universal time), daylight saving on/off,
- Home city/World time city swapping
- Size of case / total weight
- EFA-131D…… 50.3 X 46.0 X 12.5 mm / 185g
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