Casio Women's Futurist Alarm Chronograph LCD Watch #LA201W-2A Electro-luminescent backlight Afterglow, Dual time , 1/100-second Stopwatch Measuring capacity: 23:59'59.99'', Measuring modes: Elapsed time, split time, 1st-2nd place times Daily alarm, Hourly time signal, Auto-calendar (to year 2099) 12/24-hour format, Regular timekeeping: Hour, minutes, seconds, pm, month, date, day Accuracy: 20 seconds per month, Approx. battery life: 3 years on CR1216