CASIO B640WD-1AVEF

Case size (L× W× H) 38.9 × 35 × 9.4 mm
Weight 49 g
Case and bezel material Resin Band
Stainless Steel Band
Adjustable Clasp
Water resistance
Stopwatch
Countdown timer
Countdown range: 24 hours
Multi-function alarm
Flash alert feature
Flashes with buzzer that sounds for alarms, hourly time signal
LED backlight
Calendar
12/24-hour format
Regular timekeeping: Hour, minute, second, pm, month, date, day