Casio | B640WB-1BVT Watch - Black - Vintage Collection

Case size (L× W× H)
38.9 × 35 × 9.4 mm

Weight
49 g

Case and bezel material
Resin

Band
Adjustable Clasp
Stainless Steel Band

Water resistance
50-meter water resistance
Power supply and battery life
Approx. battery life: 3 years on CR2016

Glass
Resin Glass

Surface treatment
Black ion plated band
Black IP

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

Alarm/hourly time signal
Hourly time signal
Multi-function alarm

Flash alert feature
Flash alert
Flashes with buzzer that sounds for alarms, hourly time signal

Light
LED backlight
Afterglow

Light color
LED:Amber

Calendar
Full auto-calendar (to year 2039)

Accuracy
Accuracy: ±30 seconds per month
Other features
12/24-hour format
Regular timekeeping:
Hour, minute, second, pm, month, date, day