1.Temperature, Humidity, Atmospheric Pressure: the product is used to measure the temperature, humidity, atmospheric pressure and other parameters of the environment, and accurately predict future weather changes according to the changes in ambient temperature, humidity and atmospheric pressure. No battery required. 2.INDOOR OUTDOOR USE You can install this weather station anywhere inside or outside your home. Since it is wireless, you don't even need a socket nearby. Use it in your home, in your garden or even in a RV. The barometer works perfectly up to a height of 3,000 feet above sea level, so you can use it in many geographic regions. 3.BEAUTIFUL DECORATION This beautiful, traditional piece is suitable for any fine study, library, or upscale restaurant. 4.EASY TO SET UP AND CALIBRATE Setting up this weather station is simple. To install, simply use a hammer or nail gun to hammer a nail into your wall and hang the device. The back of this weather station is housed in a black plastic cover with a refined brass display and a glass lens. Simply follow the included instructions to calibrate the barometer.