Case size (H × W × D): 52.5 × 46.4 × 14.4 mm Weight: 58g Case material: bio resin and stainless steel Strap: bio resin Waterproof: 100-meter waterproof Solar power Super illuminator: Fully automatic LED light, optional illumination duration is 1.5 seconds or 3 seconds Environmental resistance: Low temperature resistance (-10/14) Altimeter: Measurement range: -700 to 10,000 m (-2,300 to 32,800 ft) Measurement unit: 1 m / 5 ft Manual measurement memory (up to 30 records, each containing altitude, date, time) Automatic data recording (high/low altitude, automatic cumulative ascent and descent) Trek log data (up to 14 high/low altitude records, automatic cumulative ascent and descent of individual treks) Barometer: 260 to 1,100 hPa (barometric pressure trend information alarm, audible signal and arrow indicating significant pressure changes) World time: 31 time zones (48 cities + Coordinated Universal Time), daylight saving time on/off Digital compass Viewing sunrise and sunset times Sto