Striking the perfect balance between style and functionality, the B640WD-1A features a sleek, silver finish with a range of functions including a calendar, multi-alarm, and stopwatch. The light-emitting diode (LED) ensures readability in any light setting and is 50m water resistant.
Band
Adjustable Clasp
Stainless Steel Band
Case and bezel material
Resin
Case size (L× W× H)
43.1 × 41.2 × 10.5 mm
Power supply and battery life
Approx. battery life: 7 years on CR2016
Water resistance
50-meter water resistance
Weight
63 g
Compatible band size
Glass
Resin Glass
Accuracy
Accuracy: ±30 seconds per month
Calendar
Auto-calendar (set at 28 days for February)
Light
LED backlight
Other features
12/24-hour format
Regular timekeeping:
Hour, minute, second, pm, date, day
Stopwatch
1/100-second stopwatch
Measuring capacity: 59'59.99''
Measuring modes: Elapsed time, split time, 1st-2nd place times
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