LED Lights Auto light button, illumination duration to choose from, incandescent Thermometer Display range: -10 to 60-Degree C (14 to 140-Degree F) Display unit: 0.1-Degree C (0.2-Degree F) World time 31 time zones (48 cities + universal time coordinated), summer time active / off, city exchange Origin / city time of the World Month data (month age for a specific date, month phase graph) Wave chart (wave level for specific date and time) Stopwatch 1/100 sec Measurement capacity: 999: 5959.99 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 Analog: 2 needles (hour, minute (needle move every 20 seconds)), 1 dial (tidal level) Digital: Hour, minute, second, pm, month, date, day Accuracy:± 15 seconds per month Estimated battery life: 3 years on SR927W × 2 Case size: 55 × 51.2 × 16.9 mm Total weight: 73 g