Indoor Digital Humidity Meter Hygrometer Thermometer with Large LCD Display Temperature Alarm Clock (HTC-1) Economical way to monitor indoor temperature and humidity,Temperature unit C/F changeable Memory of MAX/MIN values of temperature & humidity, Temperature range: IN side temperature: -10~+50C (+14~+122F), OUT side temperature: -50~+70C (-58~+158F), humidity range: 20%~99%RH. Power-supply: 1.5V (AAA size) x 1 Display indoor/ outdoor temperature display, indoor humidity, Power-supply: 1.5V (AAA size) x 1(Included), Hourly alarm function, Everyday alarm function Display temperature and humidity simultaneously, desk-top placing or Wall Hanging Push 'IN-OUT' button to select to show INSIDE or OUTSIDE temperature (IN or OUT will be indicated on LCD screen).