Wide Transmission Range The hygrometer thermometer is linked with a radio transmitter that provides strong wireless signal penetration (433MHz frequency). The thermometer has a wide transmission range of 30-100 meters (98-328 feet) in open areas, allowing for quick and timely signal reception within the transmission range.Multi-Function Indoor and Outdoor Thermometer for Healthy Living This device measures indoor and outdoor temperature and humidity values. It is ideal for monitoring conditions in homes, offices, workshops, and similar environments.Accurate Reading & Large LCD Screen Features a large LCD screen for clear and easy viewing. Measures indoor temperature from 0C to 60C (32F to 140F), outdoor temperature from -40C to 60C (-40F to 140F), and humidity from 10% to 99%, with accuracy within 1C and 5%. Automatically updates data every 60 seconds (sensor stabilization takes approximately 30 minutes).Easy to Use Switch between Celsius and Fahrenheit using the button. Note: Batteries must be reinstalled after changing temperature units.Portable Design & Easy Installation Equipped with a wall mount and a retractable stand on the back, allowing for easy placement on a table or mounting on a wall. This digital hygrometer thermometer is a reliable companion for your household.