Product describe:Indoor and outdoor temperature, indoor humidity display. C/F temperature switch display, comfort level display.The maximum and minimum temperature memory inside and outside.Automatic storage of the highest/lowest room temperature and humidity values.Comes with a backrest for easy placement. The built-in sensor measures the temperature at the same time.Specification:Room temperature: 0C to 50C / 32F to 122FOutdoor temperature range: -50C to 70C/-58F to 158FIndoor humidity: 20%RH90%RHRequires 1 AAA battery (not included)Sensor cable length: about 90 cm/35.4 inchesProduct weight: 66 g/2.32 ozPower supply: powered by 1 AAA battery (battery not included)Package Included:1 x Digital LCD Thermometer HygrometerNote: The battery is not included.