FEATURES:
.1-second stopwatch
.Measuring capacity: 11:59'59
.Measuring mode: Elapsed time
.Date display
.Regular timekeeping
.Analog:
.3 hands (timekeeping hour and minutes, stopwatch seconds
.3 dials (timekeeping seconds, stopwatch hours and minutes)
.Accuracy: ±20 seconds per month
.Approx. battery life: 2 years on SR927W
.Size of case / total weight
.EF-539SG : 53.5 X 48.5 X 11.5 mm / 198 g