About this item ㅁSY TO INSTALL㍩ni Digital Hygrometer Thermometer is Easy to know current temperature and humidity,Embedded opening size (1.81*1.06 inch) or fixed with double-sided tape. 㲠IN 1㈹grometer with built-in probe; digital electronic thermometer and hygrometer for measuring temperature and humidity for indoor use. ㈩gh Precision Display㠈umidity Temperature measurement accuracy: ? Humidity measurement accuracy: ?H. 㗉DE TEMPERATURE TEST㠈ygrometer Temperature measuring range -58⭱58⻠Humidity measuring range 1%-99%RH. ㌏NG BATTERY LIFE㠈ygrometer Thermometer Powered by LR44 button cell (Included), Battery working time up to 8 months. Package Includes: 4 x Digital Thermometer Hygrometer; Give away: 4*LR44 spare battery; 4 x Double-sided tape.