Backlight electrostatic Length of selected illumination (1.5 seconds or 3 seconds), incandescent World time 29 time zone (48 cities), summer time on / off Stopwatch 1/100 sec Measurement capacity: 5959.99-inch Measurement mode: Elapsed time, split time, second-first position time Back timer Unit of measurement: 1 second Distance back time: 24 hours Setting time ranging from backwards time: 1 minute to 24 hours (1 minute increment and 1 hour increment) 5 daily alarms (with 1 alarm snooze) The clock signal counts Full auto calendar (until 2099) 12/24 hour format Operating button sound on / off Regular punctuality: Hour, minute, second, am / pm, date, day Accuracy:± 30 seconds per month Estimated battery life: 3 years on CR1616 Casing size: 44.7 × 40 × 12.5 mm Total weight: 44 g