Case: Resin / Stainless steel. Accuracy per month: ±20 sec. Battery Type: CR1620. Battery Life: 10 YRS. LED: Amber. 1/100-second stopwatch. Measuring capacity: 23:59'59.99". Measuring modes: Elapsed time, split time, 1st-2nd place times. 12/24-hour format. Auto-calendar (to year 2099). Daily alarms. Dual time. Hourly time signal. LED backlight: Afterglow. Regular timekeeping: Hour, minutes, seconds, pm, month, date, day. Size of case / total weight: LDF-30 ...... 40.4 X 36.8 X 10.5 mm / 24 g