Striking the perfect balance between style and functionality, the B640WC-5AD features a sleek, rose-gold 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.
2 year warranty
Band
Adjustable Clasp
Stainless Steel Band
Case and bezel material
Resin / Rose Gold tone
Case size (LΓ WΓ H)
Case dimensions (length x width x height) shown here are standard values and may differ from actual product dimensions. Use the case dimensions provided here as general reference values.
* Dimensions show the measurements indicated in the illustration above.
38.9 Γ 35 Γ 9.4 mm
Power supply and battery life
Approx. battery life: 3 years on CR2016
Water resistance
50-metre water resistance
Weight
49 g
Compatible band size
150 to 205 mm
Glass
Resin Glass
Surface treatment
Partial ion plated
Accuracy
Accuracy: Β±30 seconds per month
Alarm/hourly time signal
Hourly time signal
Multi-function alarm
Calendar
Full auto-calendar (to year 2039)
Flash alert feature
Flash alert
Flashes with buzzer that sounds for alarms, hourly time signal
Light
LED backlight
Afterglow
Other features
12/24-hour format
Regular timekeeping:
Hour, minute, second, pm, month, date, day
Stopwatch
1/100-second stopwatch
Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes)
1:00'00~23:59'59 (after 60 minutes)
Measuring unit: 1/100 second (for the first 60 minutes)
1 second (after 60 minutes)
Measuring modes: Elapsed time, split time, 1st-2nd place times
Timer
Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)
Other: Auto-repeat