SUNROAD multifunction altimeter integrates many functions inside, such as sea level altitude, climb altitude, total gain, total loss, 24-hours altitude curve, sea level air pressure, current air pressure, pressure curve, 16 directions digital compass, weather forecast, temperature, humidity, flashlight, time, date etc. The product adopts Swiss chips, the accuracy of altitude is 1 meter. the pressure accuracy of 0.1hpa. The height measurement range is very wide also, ranging from -700m to 9000m. Whether you are climbing Mount Everest or measuring the height of ordinary mountain slopes, it can meet your requirements.