This is a multifunctional digital meter, which can be used as thermometer and hygrometer. It is portable and convinient to use. It has a hole for hanging or mounting on the wall, suitable for home, office and other indoor place use. Feature - Color: Black. - Material: ABS and Acrylic. - Size: Approx. 4.5 x 4.5 x 1.5 cm/1.77x1.77x0.59inch. - Temperature range: -50 ~ 70. - Measurement error: plusmn;1. - Humidity measurement range: 20% ~ 90%. - Humidity display resolution: 1%. - Humidity measurement accuracy: plusmn;5%. - Humidity sampling cycle: 10 seconds (1 minute). - Rated voltage: DC1.5V (1 tablet AG13 button battery). - Working principle: thermistor conversion temperature display. - It is portable and won't take up too much space. - Thermometer measures temperature which can be displayed in Celsius. - Function as a thermometer and hygrometer. - Lightweight and compact, easy to install. - Suitable for all kinds of reptile pet.