Wide transmission range: the hygrometer thermometer is linked to a radio transmitter which offers strong penetration of the wireless signal (433 MHz frequency). in the open area, the signal can be received quickly and in time in the transmission area. Multi-function: indoor and outdoor thermometer, for healthy living, measures temperatures and humidity indoors and outdoors. outdoor. Accurate Reading Large LCD Display: Large LCD screen for easy and clear viewing. Indoor Temperature (0-60C/32-140F) / Outdoor Temperature (-40C-60C/-40F-140F), Humidity (10%-99%) and accuracy can reach 1C / 5% automatically data every 60 seconds (about 30 minutes to stabilize the sensor). Easy to use: It is easy to change with the button on the top on temperature units in Celsius or Fahrenheit. Please note that batteries need to be re-installed after changing C / F temperature units. Portable Design Easy Installation: With wall mount and retractable stand on the back, easy to mount on the wall or to put on the table. Digital hygrometer thermometer is an ideal life partner for your family. White color Size: as shown Shipping quantity: 1 Note: Batteries not included lucky meet Note: The data is all measured manually, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.