【Measurable Temperature Range】 -50 ~ 70℃, Temperature Measurement Accuracy: ± 1.0℃. 【Measurable Humidity Range】 10%~99%RH, Humidity Measurement Accuracy: ±5%RH, measured every 10 seconds. 【Product Size】 48 x 28.6 x 15.2mm. Battery: Two LR44 button cell batteries. This small, portable temperature and humidity measuring device is suitable for any setting. 【Temperature and Humidity Monitor】 This portable thermometer and hygrometer measures indoor humidity and temperature, helping you understand indoor air conditions. 【Wide Range of Applications】 The Thlevel mini digital thermometer and hygrometer is widely used in living rooms, greenhouses, instrument rooms, wine cellars, basements, warehouses, attics, nurseries, and dressing rooms.