ThermoPro TP49W-4 Digital Mini Thermo-Hygrometer Thermometer Room Thermometer 4 in 1 Indoor Temperature and Humidity Monitor with Smiley Indicator

["For a healthy indoor climate: With the practical room thermometer, you can keep an eye on the temperature and humidity through the clear display and now have control over the indoor climate in the rooms where you spend most of your time, such as living room, bedroom, children's room, office, and storage room","Advanced high-precision sensor: Built-in with an accurate and sensitive sensor, the thermo-hygrometer updates the temperature and humidity every 10 seconds; Temperature measuring range: -50 ~ 70 Celsius, optional in Celsius and Fahrenheit; Humidity: 10% ~ 99%","Smiley as comfort indicator: The humidity meter displays the state of the indoor climate in three symbols with neutral, smiling, and sad faces, indicating whether the values are within the recommended range or action is needed.","Flexible mounting: You can place this room thermometer either through the folding stand or mount it on the wall using the hanging hole on the back; The built-in magnet allows the indoor hygrometer to be attached to metal surfaces as well.","Energy-saving battery: 4 x 1.5 V AAA battery is included in the package; So you can use the thermometer indoors right after unpacking; The battery lasts 18 to 24 months under normal use."]