Casio Digital Square face, blck resin Band F91W-1

Case size (L× W× H) - 38.2 × 35.2 × 8.5 mm
Weight - 21 g
Case and bezel material - Resin
Band - Resin Band
Water resistance - Water Resistant
Power supply and battery life - Approx. battery life: 7 years on CR2016

Glass - Resin Glass
Compatible band size - 145 to 200 mm

Stopwatch - 1/100-second stopwatch, Measuring capacity: 59'59.99''
Measuring modes: Elapsed time, split time, 1st-2nd place times

Alarm/hourly time signal - Daily alarm, Hourly time signal
Light - LED light
Calendar - Auto-calendar (set at 28 days for February)
Accuracy - Accuracy: ±30 seconds per month
Other features - 12/24-hour format
Regular timekeeping: Hour, minute, second, pm, date, day