Mineral Glass 100-meter water resistance Case / bezel material: Resin Resin Band LED backlight Full auto LED light, selectable illumination duration, afterglow Solar powered Low-temperature resistant (–10°C/14°F) Digital compass 60 seconds continuous measurement Graphic direction pointer Bidirectional calibration and northerly calibration function Magnetic declination correction Bearing memory Altimeter Measuring range: –700 to 10,000 m (–2,300 to 32,800 ft.) Manual memory measurements (up to 30 records, each including altitude, date, time) Auto log data (High/low altitudes, auto cumulative ascent and descent) Trek log data (up to 14 records of high/low altitudes, auto cumulative ascent and descent of particular treks) Others: Relative altitude readings (–3,000 to 3,000 m) *Changeover between meters (m) and feet (ft) Barometer Thermometer Display range: –10 to 60°C (14 to 140°F) Display unit: 0.1°C (0.2°F) *Changeover between Celsius (°C) and Fahrenheit (°F) World time 31 time zones (48 cities + coordinated universal time), city name display, daylight saving on/off Sunrise, sunset time display Sunrise time and sunset time for specific date, daylight pointers 1/10-second stopwatch Measuring capacity: 999:59'59.9'' Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments) 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 Accuracy: ±15 seconds per month Approx battery operating time: 9 months on rechargeable battery (operation period with normal use without exposure to light after charge) 24 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) LED:White Case Diameter: 54.6 X 52.4 X 14.4 mm