HTC Instrument 288-CTH Digital Hygro Thermometer with Clock Big 3 Line Display Meter Features: Big display thermo / hygrometer with clock large 3 line lcd display. Temperature comfort display :"comfort","wet","dry".Temperature range : -50°c - 70°c (-58°f - 158°f). Temp. Accuracy : 0.5°c(0°c - 40°c) or plus1 percent. Humidity range : 10 percent - 99 percent rh. Humidity accuracy : plus3 percent rh (50 percent - 80 percent)or plus5 percent battery: Aaa 1.5v. Time / temp / humidity indicate. Temp. Reading for °f and °c. Max and min temperature and humidity memory. Calendar with alarm clock.