The iPower Humidity Monitor with Indoor Thermometer with Touchscreen is the perfect tool to help you keep track of temperature and humidity levels in your home. With a temperature display range of 14.0?~122.0? and an accuracy of +/- 1°C, you can be sure that you're always getting accurate readings. The resolution is also impressive, at 0.1?, so you can be confident in the reading even if the temperature changes rapidly. The humidity display range is 10%-99%RH, and it also has an accuracy of +/- 5%, so you can be sure that your home is always at a comfortable level. The power supply is a 3 Volt CR2032 button battery, so it's easy to keep this unit running. The dimensions are 2.9" x 2.4'' x 0.5'', and the weight is 1.8 ounces, making it very portable. When the display dims, it's time to replace the battery. This unit is a great way to ensure that your home is always comfortable and safe!