With material, it is great for you to use it as a indoor humidity meter for your house, bedroom, kids room, garage, workshop, barn, basement and even your cigars. Or as a outdoor analog hygrometer for your patio and your greenhouse. Feature - Color: White - Material: ABS. - Size: 7.5 x 7.5 x 2cm. - Measurement Range: Temperature - 30 C - 50 C Error (+1 C). - Humidity: 20%-100% error (+2.5%). - Size: 14x14x2.8cm - Great accurate temperature readings with this Mini Digital which has a simple appearance, unobtrusive design. - Made of durable materials, for use in refrigerators, chillers and deep freezes, the has a range of -30 degree to + 50 degree. - Size of the Refrigerator Freezer Digital makes it for any situations. where you need an accurate reading and the easy-to-read screen show the temperature of the environment in Celsius. - Modern type and hygrometer, dial with easy-to-read scale. - Warm Tip: Dear buyer, Due to lighting effect,monitor’s brightness,manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. sincerely hope that you can understand! Thank you! Package list: 4 x Hygrothermograph