Display either humidity from 10.0 to 95.0 %RH or temperature from 32.0 to 140.0°F with this hygro-thermometer. Resolution is 0.1°F and 0.1% RH. Temperature accuracy is ±0.4°F and humidity accuracy is ±1.5%. Integral sensors have a response time of 30 seconds to 3 1/2 minutes. Unit comes complete with a user's manual, Traceable® Certificate, a hard, plastic carrying case and a 9V battery.