Casio B640WB-1ADF Digital

Case / bezel material: Resin
Adjustable Clasp
Stainless Steel Band
Resin Glass
Black ion plated band
Black IP
LED backlight
Afterglow
LED:Amber
12/24-hour format
Regular timekeeping:
Hour, minute, second, pm, month, date, day
50-meter water resistance
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
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
Hourly time signal
Multi-function alarm
Flash alert
Flashes with buzzer that sounds for alarms, hourly time signal
Full auto-calendar (to year 2039)
Accuracy: ±30 seconds per month
Approx. battery life: 3 years on CR2016
Case size (L× W× H):38.9 × 35 × 9.4 mm
Weight:49g