Acmee Indoor Humidity Monitor Thermometer Sensor Thermostat Home Office Digital Indoor Hygrometer with Memory (HC520) Economical way to monitor indoor or outdoor temperature and humidity, temperature unit / changeable Memory of MAX/MIN values of temperature & humidity 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)