This is a set of humidity meter, made from , which is durable using. It can measure the of pet crawler box and refrigerator, there will display on the screen, built-in probe. Small size, light weight, easy to carry or store and use. Features -Color:White -Material:plastic -Size:9.70X7.50X2.30cm/3.81X2.95X0.90in -Use 2pcs AAA batteries(not included) - measurement range: - 20 ~ 70 degree centigrade C (1589-4 ~ f) -Humidity measuring range: 20% ~ 95% -Measurement error: + / - 1 degree centigrade C (+ / - 5%) -This indoor allow you to easily and fast know the environment and humidity around you anywhere. -Perfect to use in reptile, aquarium, poultry, office, bedroom, living room, incubators, brooders and so on. -Digital electronic and hygrometer for measuring and humidity for indoor use. -With LCD, better visual effects, you can see the or humidity in the distance. -It's a great hygrothermograph for indoor or outdoor use. Package list: 1 x Hygrothermograph