4-piece portable room thermometer and hygrometer set, black

Mini, durable, portable. Measures indoor/outdoor humidity and temperature. Contains 4 batteries. High reliability and high accuracy. Converts between Fahrenheit (℉) and Celsius (℃). Humidity measurement range: 10% to 99% RH, humidity measurement accuracy: +/- 5% RH. Temperature measurement range: 0°C to 70°C, temperature measurement accuracy: +/- 1°C. Fast response, measuring every ten seconds via 24 sensitivity vents to provide the most recent and accurate readings. Product Description: More than that! Built-in installation type! LCD digital display! Widely used in homes, offices, cars, schools, hotels, laboratories, nurseries, aquaculture, instrument workshops, libraries, factories, and air-conditioned spaces, etc. Specification: Type: Digital thermometer/hygrometer. Material: PVC plastic. Display: Always-on LCD screen. Mounting plate hole size: D42 mm. Humidity range: 10% to 99% RH (humidity measurement accuracy: +/- 5%). Temperature measurement range: 0°C to 70°C (temperature measurement accuracy: +/- 1°C). Dimensions: 1.7" x 1.7" x 0.6" / 44 mm x 44 mm x 15 mm (diameter: 44 mm / 1.7"). Batteries included. 1.5V, LR44 button cell battery size. Color: black. Package includes: 4 x thermometer hygrometer (includes 4 batteries)