Essick Air Digital Hygrometer Thermometer Hygrometer with easy-to-read digital display for tabletop or wall mount. Measures temperatures between 50 deg degrees F Fahrenheit and 106 deg F. Measures relative humidity between 20% and 90%. 1 AAA battery included. 2.5 W x 4.25 H x 0.66 D. Made of polystyrene. UL Underwriter's Laboratories listed. Scale Fahrenheit, Readout Digital, Temperature Range 50 to 106 Degrees F, Humidity Range 20% to 90% RH, Battery Type 1 AAA Battery, Pkg Qty 1, Package Type Card WARNING This product can expose you to chemicals including benzne which is known to the State of California to cuase cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov