Electro-luminescent backlightFull auto EL light, selectable illumination duration, afterglow Solar powered Low-temperature resistant (-10C/14F) Digital compassMeasures and displays direction as one of 16 pointsMeasuring range: 0-Degree to 359-DegreeMeasuring unit: 1-Degree20 seconds continuous measurementGraphic direction pointerBidirectional calibration and northerly calibration functionMagnetic declination correctionBearing memory AltimeterMeasuring range: -700 to 10,000 m (-2,300 to 32,800 ft.)Measuring unit: 5 m (20 ft.)Manual memory measurements(up to 14 records, each including altitude, date, time)High Altitude / Low Altitude memoryTotal Ascent / Descent memoryOthers: Reference altitude setting, altitude differential*Changeover between meters (m) and feet (ft) BarometerDisplay range: 260 to 1,100 hPa (7.65 to 32.45 inHg)Display unit: 1 hPa (0.05 inHg)Atmospheric pressure tendency graphAtmospheric pressure differential graphic*Changeover between hPa and inHg Barometric pressure change indicator ThermometerDisplay range: -10 to 60C (14 to 140F)Display unit: 0.1C (0.2F)*Changeover between Celsius (C) and Fahrenheit (F) Moon data (moon age of the specific date, moon phase graph) Tide graph (tide level for specific date and time) Duplex LC display World time31 time zones (48 cities + coordinated universal time), city code display, daylight saving on/off 1/100-second stopwatchMeasuring capacity: 23:5959.99-InchMeasuring modes: Elapsed time, split time, 1st-2nd place times Countdown timerMeasuring unit:1 secondCountdown start time setting range: 1 to 60 minutes (1-minute increments)Reset time: 5 minutesOthers: Time up alarm, progress beeper Daily alarms5 independent daily alarms Hourly time signal Battery level indicator Power Saving (display goes blank to save power when the watch is left in the dark) Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, pm, year, month, date, day Accuracy: ±15 seconds per month Approx. battery operating time:6 months on rechargeable battery (operation period with normal use without exposure to light after charge)23 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Size of case : 56.3 × 50.6 × 15mm Total weight : 71g