1.Large Transmission RangeThe hygrometer thermometer is connected to a radio transmitter, which provides strong wireless signal penetration (433 MHz frequency). The thermometer has a wide transmission range (30-100m/98-328ft) in open areas, and can receive signals quickly and timely within the transmission area.2.Multi-functionIndoor and outdoor thermometer, used for healthy life, measuring indoor and outdoor temperature and humidity values. Mainly used to measure indoor temperature and humidity in homes, offices, workshops, etc.3.Accurate Reading and Large LCD Display: Large LCD display for easy and clear viewing. Indoor temperature (0-60C/32-140F)/outdoor temperature (-40C-60C/-40F-140F), humidity (10%-99%), accuracy up to 1C/5% Data is automatically updated every 60 seconds (about 30 minutes to stabilize the sensor).4.Easy to Use: Use the button on the top to easily switch between Celsius or Fahrenheit temperature units. Please note that the batteries must be reinstalled after changing the C/F temperature unit.5. Portable design, easy to install: With a wall mount and a telescopic bracket on the back, it can be easily installed on the wall or placed on the table. The digital hygrometer thermometer is an ideal life partner for your family.