Military Digital GPS Bike Computer Speedometer Compass Hiking Survival Compass Outdoor Camping Hiking Climbing Altimeter|CompassFeatures:Adopt super-accuracy sensor from Swiss.Altitude total gain/loss, 24 hours altitude record and chart.Max/min altitude, temperature, huminity record.24 hours air pressure trend chart.Incorporates altimeter, barometer, compass functions, etc.Thermometer, hygrometer, time, date, alarm clock, LED torch.Built-in rechargable battery.LCD backlit.IPX 4 waterproof.Note:Please do NOT submerge in water.Specifications:Altimeter:Altimeter range(-700 to 9000m/-2296 to 29500ft)Resolution of 1 meter/feetMax./Min. memory for altitudeAltitude history and graphical display of the last 24 hour altitude readingsAltitude total gain or loss 44999 meter/feetBarometer:Pressure range 300hpa to 1100hpa(8.84inHg to 32.44inHg)Resolution of 0.1hpa(0.01inHg)24 hour pressure history and graphical displayElectronic pressure weather forecast(sunny, slightly cloudy, cloudy, rainy)Pressure trend indicatorsThermometer:Range from -20 to 60 (-4 to 140) and selectableMax./Min. memory for temperatureHygrometer:Relative humidity(20% - 95%)Max./Min. memory for relative humidityPackage:Material: PlasticColor: Black + yellowBuilt-in battery: 300mAhItem size: 10 * 6.5 * 2cm / 3.9 * 2.6 * 0.8inItem weight: 70g / 2.5ozPackage size: 16 * 11 * 3.5cm / 6.3 * 4.3 * 1.4inPackage weight: 128g / 4.5ozPackage List:1 * Altimeter1 * Charging Cable1 * Lanyard1 * Cleaning cloth1 * User Manual (English)