Features： 1、Using high?accuracy digital temperature and humidity sensor, high accuracy, fast speed and good stability. 2、It is suitable for data collection and monitoring of ambient temperature and humidity for indoor and outdoor temperature measurement. 3、Equipped with a backlit LCD screen and small size, which is easy to use and can be used in dark environments. 4、With maximum and minimum functions. The temperature resolution is 0.1 DegreeC/0.2 DegreeF. 5、It is widely used in temperature and humidity measurement in industry, agriculture, meteorology, medical treatment and daily life. Specification： Item Type: Thermometer Hygrometer Material: Plastic Weight: Approx. 133g / 4.7oz Product Size: Approx. 150x52x33mm / 5.9x2.0x1.3in Battery: 6F22 9V battery (battery not included) Humidity Range: 0%~100%RH Resolution: 0.1 Humidity Range: 0%-20%RH Accuracy: 4.5% 20%-80%RH Accuracy: 3.0% 80%~100%RH Accuracy: 4.5% Temperature Range: -30℃~70℃ Temperature Range: -30℃~0℃ Accuracy: 1.0℃ 0℃~70℃ Accuracy: 0.5℃ -22 DegreeF-320 DegreeF Accuracy: 1.8 DegreeF 32 DegreeF-158 DegreeF Accuracy: 0.9 DegreeF Temperature Resolution: 0.1 DegreeC/0.2 DegreeF Scope of Application: Widely used in temperature and humidity measurement in industry, agriculture, meteorology, medical treatment and daily life. Package List： 1 x Thermometer Hygrometer (battery not included) 1 x Manual