• Chronometer with hundredths of a second • Waterproof up to 50 meters • Vintage design • LED backlight
Case dimensions (H x W x D)
38.9 × 35 × 9.4 mm
Weight
49 g
Case and bezel material
resin
Strap
Adjustable clasp
Stainless steel strap
Water resistance
Waterproof up to 5 bar
Power and battery life
Approximate battery life: 3 years with CR2016
Glass
h2>Resin glass
Surface treatment
With partial ion plating
Stopwatch
Hundredth-second stopwatch
Measuring capacity: 00’00”00~59’59”99 (for the first 60 minutes)
1:00’00~23:59’59 (after 60 minutes)
Unit of measurement: 1 hundredth of a second (for the first 60 minutes)
1 second (after 60 minutes)
Measurement modes: elapsed time, split time, 1st and 2nd place times
Timer
Countdown timer
Unit of measurement: 1 second
Countdown interval: 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
Audible reminder / Time signal
Time signal
Multi-function sound reminder
Flashing alerts
Flashing light alert
Flashes with a beep that sounds for audible reminders and time signal
Light
LED backlight
Luminescence
Light color
LED:Amber
Calendar
Full automatic calendar (up to the year 2039)
< h2>Accuracy
Accuracy: ±30 seconds per month
Other features
12/24 hour format
Regular timekeeping :
hour, minute, second, pm, month, date, day
B640WC-5A
Case dimensions (H x W x D)
38.9 × 35 × 9.4 mm
Weight
49 g
Case and bezel material
resin
Strap
Adjustable clasp
Stainless steel strap
Water resistance
Waterproof up to 5 bar
Power and battery life
Approximate battery life: 3 years with CR2016
Glass
h2>Resin glass
Surface treatment
With partial ion plating
Stopwatch
Hundredth-second stopwatch
Measuring capacity: 00’00”00~59’59”99 (for the first 60 minutes)
1:00’00~23:59’59 (after 60 minutes)
Unit of measurement: 1 hundredth of a second (for the first 60 minutes)
1 second (after 60 minutes)
Measurement modes: elapsed time, split time, 1st and 2nd place times
Timer
Countdown timer
Unit of measurement: 1 second
Countdown interval: 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
Audible reminder / Time signal
Time signal
Multi-function sound reminder
Flashing alerts
Flashing light alert
Flashes with a beep that sounds for audible reminders and time signal
Light
LED backlight
Luminescence
Light color
LED:Amber
Calendar
Full automatic calendar (up to the year 2039)
< h2>Accuracy
Accuracy: ±30 seconds per month
Other features
12/24 hour format
Regular timekeeping :
hour, minute, second, pm, month, date, day
B640WC-5A
