The A100 series with a unisex design and a stylish retro look.
 
 The A100 series is a reproduction of the F-100, the first model to sport a resin case from CASIO. The design has been updated to be a more modern version while retaining the F-100's distinctive four front button layout.
 
 Features and functions include automatic calendar, stopwatch, water resistance and au LED light for easy reading in the dark.
 
Case size: 40.7×32.7×9.2mm
Adjustable clasp
Stainless steel strap
Resin glass
Water resistant
LED backlight
1/10th second stopwatch
Measuring capacity : 59'59.9''
Measurement modes : Elapsed time
Daily alarms
Time passing signal
Automatic calendar (28 days for February)
Current analog hour: Hour, minute, second, pm, month, date, day
Accuracy : +/- 30 seconds per month
Approximate battery life: 3 years on CR1616
Total weight: 53g