Casio Ladies Sheen Chronograph Alarm Watch Model SHN1001F-1ADF Electro-luminescent backlight, 1/100-second stopwatch-Measuring capacity: 59'59.99'', Measuring modes: Elapsed time, split time, 1st-2nd , & place times Daily alarm, Hourly time signal, Auto-calendar (28 days for February) 12/24-hour format, Regular timekeeping: Hour, minutes, seconds, pm, date, day date, day Accuracy: 30 seconds per month, Approx. battery life: 2 years on CR1216 Size of case/total weight-SHN-1001F : 40.8 X 22.2 X 9.8 mm / 66 g