Electro-luminescent backlightSelectable illumination duration (1.5 seconds or 3 seconds), afterglow Digital compassMeasures and displays direction as one of 16 pointsMeasuring range: 0 to 359-DegreeMeasuring unit: 1-Degree10 seconds continuous measurementGraphic direction pointerBearing sensor correctionMagnetic declination correction ThermometerDisplay range: -10 to 60 C (14 to 140F)Display unit: 0.1 C (0.2 F)*Changeover between Celsius (C) and Fahrenheit (F) World time31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping 1/100-second stopwatchMeasuring capacity: 5959.99-InchMeasuring modes: Elapsed time, split time, 1st-2nd place times Countdown timerMeasuring unit: 1 secondCountdown range: 24 hoursCountdown start time setting range: 1 minute to 24 hours (1-hour increments and 1-minute increments)Other: Auto-repeat 5 daily alarms (with 1 snooze alarm) Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: ±20 seconds per month Approx. battery life: 5 years on CR2025 Size of case : 50.6 × 45 × 12.8 mm Total weight : 46g