Case / bezel material: Resin Resin Band Mineral Glass Shock Resistant 200-meter water resistance LED Backlight (Super Illuminator) Selectable illumination duration, afterglow Altimeter Measuring range: -700 to 10,000 m (-2,300 to 32,800 ft.) without reference altitude Measuring unit: 5 m (20 ft.) Other: Reference altitude setting *Changeover between meters (m) and feet (ft) Barometer Display range: 260 to 1,100 hPa (7.65 to 32.45 inHg) Display unit: 1 hPa (0.05 inHg) Atmospheric pressure differential pointer *Changeover between hPa and inHg 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 code display, daylight saving on/off 1/100-second stopwatch Measuring capacity: 23:59'59.99'' 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-hour increments and 1-minute increments) 5 daily alarms 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: ±15 seconds per month Battery: CR2025 Size of case : 55×51.2×17.2mm Total weight : 69.2g