100% Brand New. Display temperature, humidity and time simultaneously Memory of MAX & MIN measuring value 12-hour / 24-hour displaying system selectable ºC / º F unit selectable Integral-hour alarm function Alarm function Clock & Calendar function (month and date ) Desk-top placing or Wall Hanging Feature: Temperature range: -50~ + 70 degree centigrade ( -58 ~ +158 Fahrenheit ) Humidity range: 20%~99%RH Resolution: Temperature: 0.1 degree centigrade ( 0.1 Fahrenheit) Humidity: 1%RH Temperature :± 1degree centigrade( 1.8 Fahrenheit) Humidity :± 5 RH ( 40% ~ 80% ) Power supply: 1.5V ( AAA size ) X 1 Product dimension: 100 x 100 x 15mm Storage condition: -20 degree centigrade ~60 degree centigrade , 20~80%RH Package Included: 1 x Temperature & Humidity Meter (Batteries are not included) 1 x English Manual