AcuRite® Indoor Temperature and Humidity Monitor
Temperature sensor measures from -4° F to 158° F (-20° C to -70° C). Humidity sensor measures indoor humidity from 1% to 99% RH. Helpful humidity meter indicator lets you know if your classroom or home is in a safe range. Measurements are updated every 10 seconds. Features enhanced accuracy of ±2° F and ±2% RH with manual calibration option. Displays high and low records for previous 24 hours and for all time. Totally wireless unit can rest on the tabletop, mount to a wall, or adhere to a magnetic surface. 2-1/2 in. L x 1 in. W x 3 in. H. Requires two AAA
batteries (not included).