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 Temperature range: -50~ + 70 ºC ( -58 ~ +158 º F ) Humidity range: 20%~99%RH Temperature: 0.1 ºC ( 0.1º F) Humidity: 1%RH Temperature :± 1 ºC ( 1.8 º F ) Humidity :± 10 RH ( 40% ~ 80% ) Power supply: 1.5V ( AAA size ) X 1 Product dimension:1009320mm Weight : appros.125g Storage condition: -20 ºC ~60 ºC , 20~80%RH 1 x Temperature & Humidity Meter 1 x AAA Battery ( with Battery) 1 x English Manual