Made of carefully selected ABS materials, this indoor outdoor thermometer hygrometer has long-term durability and excellent performance, which can serve you well. The display is compact but easy to read, you can place it in a location that is accessible and easy for you to view. Features -Color:White -Material:ABS -Size:15.20X9.55X2.20cm/5.97X3.75X0.86in -Size:10.50X5.00X2.60cm/4.13X1.97X1.02in - Power supply: 3 x AAA batteries(Not included) - Measuring range: - Indoor temperature display range: -9.9 degree centigrade ~ +50 degree centigrade & 14 fahrenheit scale ~ +122 fahrenheit scale - Indoor humidity range: 20%-95% RH - Outdoor temperature display range: -40 degree centigrade ~ +60 degree centigrade & -40 fahrenheit scale ~ +140 fahrenheit scale - Outdoor humidity range: 20%-95% RH - Resolution: - Temperature display resolution: 0.1 degree centigrade & 0.1 fahrenheit scale - Humidity display resolution: 1%RH - Error: - 0 degree centigrade to 40 degree centigrade/ 32 °F to 104 °F: ±1 degree centigrade/1.8°F - -20 ~ 0 degree centigrade/40 degree centigrade ~ 65 degree centigrade/-4 fahrenheit scale ~ scale/104 fahrenheit scale ~ 149 fahrenheit scale: ±2 degree centigrade/3.6°F - 40%RH to 80%RH: ±5%RH - Weather station can measure and display temperature and humidity at indoor/outdoor. - Room thermometer features a clear display with compact digits but allows you to view readings. - The design is compact and simple, wireless weather station is convenient to use and move. - This thermometer hygrometer ensures proper indoor humidity that achieves important health benefits. - Indoor outdoor thermometer, suitable for kids room, living room, office, basement, kindergarten, etc. Package list: 4 Thermometer 4 x Launcher