The indoor thermometer hygrometer is made of ABS material, ensure maximum durability for usage. Easily monitor temperature and humidity data in real time. The indoor thermometer hygrometer is perfect for wine cellars, basements, home, hotels, hospitals, etc. 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 - Wireless weather station can be applied to be used in company, factory, school, shopping mall, etc. - Portable size and large digits make hygrometer thermometer easy to read and be placed in indoor locations. - Large LCD display screen, easy to read, ensure you’re always aware of changes to your home with just a quick glance. - This digital hygrometer thermometer displays temperature and humidity to allow you to make proper comparisons. - The indoor outdoor thermometer has proper size, light in weight and won't take up much more space. Package list: 2 Thermometer 2 x Launcher