Indoor and Outdoor Thermometer with Large Transmission Range: This thermometer/hygrometer is equipped with an audio transmitter that offers strong wireless signal penetration (433 MHz frequency). The thermometer has a wide transmission range (30-100 m/98-328 ft) in open areas, allowing for rapid and accurate signal reception within the transmission zone. Multifunctional Indoor and Outdoor Thermometer: For a healthy lifestyle, it measures temperature and humidity levels both indoors and outdoors. Primarily used for measuring temperature and humidity in homes, offices, workshops, etc. Accurate Reading: Large LCD Screen: The large LCD screen provides a simple and clear reading. Indoor temperature (0-60C/32-140F) / Outdoor temperature (-40C-60C/-40F-140F), Humidity (10%-99%), and accuracy up to 1C/5%. Automatically records data every 60 seconds (approximately 30 minutes for sensor stabilization). Easy to use: Easily switch between Celsius and Fahrenheit temperature units using the button