Features: Adopt super accuracy sensor from Swiss. Total elevation gain/loss, 24 hour altitude and graph record. Max/min. Altitude, temperature, humidity record. Air pressure trend chart 24 hours. It includes altimeter, barometer, compass functions, etc. Thermometer, hygrometer, time, date, alarm clock, LED flashlight. Built-in rechargeable battery. LCD with backlight. IPX 4 waterproof. Specifications:Altimeter:Altimeter Range (-700 to 9000m/-2296 to 29500ft)Resolution 1 meter/ftMax./Min. Memory for AltitudeAltitude history and graphical display readings of the last 24 hours of altitudeAltitude total gain or loss 44999 meter/feetBarometer:Pressure range from 300hpa to 1100hpa(8.84inHg to 32.44inHg)Resolution 0.1hpa(0.01inHg)Pressure 24 hours history and graphical displayElectronic weather forecast (sunny, Slightly Cloudy, Cloudy, Rainy)Pressure Trend GaugesThermometer:Range from -20°C to °C (-4°C to 140°C)Max./Min. Memory for TemperatureHygrometer:Relative Humidity (20% - 95%)Max./Min. Memory for Relative HumidityPackage:Material: PlasticColor: Black+YellowBuilt-in Battery: 300mAhProduct Size: 10*6.5*2cm/3.9*2.6*0.8inProduct Weight: 70g/2.5ozPackage Size: 16*11*3.5cm/6.3*4.3*1.4inPackage Weight: 128g / 4.5oz1 * Altimeter1 * Charging Cable1 * Lanyard1 * Cleaning Cloth1 * User Manual (English)