1. This room thermometer indoor hygrometer helps monitoring temperature and humidity and display reading in real time. 2. The build-in accurate temperature and humidity sensor refresh reading continuously. A great kit for the dry season. 3. It calibrate automatically for about 10 minutes after turning on, which an accurate reading easily. Temperature and humidity are refreshed every 10 seconds. 4. This temperature humidity gauge has kickstand. You can place it where it should be. 5. The small indoor thermometer for home comes with battery and power button, providing long-lasting use. Function buttons: CLEAR-restart, /-Celsius/Fahrenheit conversion; Product size: 86x66x20mm Display screen size: 66x50mm Battery: 1xCR2032 (3V) battery (battery included) Placement method: bracket/suspension/magnet adsorption Colour:black Material:ABS Package Contents: 1 * Electronic Room Thermometer(with battery) 1 * Instructions in Chinese and English Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.