General description Mini, durable, and portable, this 4-Piece Portable Room Thermometer and Hygrometer Set is designed for both indoor and outdoor humidity and temperature measurement. It features a fast response time, measuring every ten seconds through 24 sensitivity vents to provide the most recent and accurate readings. The set includes four batteries for high reliability and accuracy. Technical specifications Humidity measurement range: 10% to 99% RH Humidity measurement accuracy: +/- 5% RH Temperature measurement range: 0℃ to 70℃ Temperature measurement accuracy: +/- 1℃ Dimensions: 1.7" x 1.7" x 0.6" / 44mm x 44mm x 15mm (Diameter: 44mm / 1.7") Material: PVC plastic Display: Always on LCD display Mounting plate hole size: D42 mm Batteries: 1.5V, LR44 button cell size (4 included) Color: Black Usage This thermometer and hygrometer set is widely used in various environments including homes, offices, cars, schools, hotels, laboratories, nurseries, aquaculture, instrument workshops,