- Case: Stainless Steel
- Accuracy per month: ±20 sec
- Battery Type: SR927W
- Battery Life: 2 YRS
- 1/20-second stopwatch
- Measuring capacity: 59’59.95″
- Measuring mode: Elapsed time
- Accuracy: ±20 seconds per month
- Approx. battery life
- 2 years on SR927W
- Auto-calendar (28 days for February)
- Daily alarms
- Date display
- Dual time
- Regular timekeeping
- Analog: 3 hands (timekeeping hour, minutes and seconds),
- 3 dials (timekeeping 24-hour, stopwatch minutes / 1/20 second and mode)
- Size of case / total weight
- EF-510D …… 42.3 x 40.7 x12.3 mm / 180 g
