Name: Thermometer Hygrometer Barometer Three-in-One Weather Station. Model #: THB9392. Measuring Range: 960~1060hPa, -30~50degree centigrade, 0~100%RH. Resolution: 1hPa, 1degree centigrade, 2%RH. Accuracy: +/- 5hPa, +/- 2degree centigrade, +/- 5%RH (40~70%RH). Unit Size: Approx. Ø13 x TH 4.1cm. Weight: Approx. 0.13kg Remind: Many customers do not understand, mistakenly believe that the white pointer is the degree of atmospheric pressure. In fact, the white pointer is just a contrast pointer. at the same position as the black color, so you can tell if the air pressure is high or low tomorrow. The white pointer is manual. It does not change by itself. Important Reminder 1. The pressure does not change every day, and the air pressure changes when the weather changes significantly.2. The weather forecast function is based only on the air pressure, and is different from the actual altitude and terrain, but not necessarily correct 3. If the location is high, the barometric pressure display