Features: Same Screen Display: 4.6-inch large backlit LCD display, large numbers make it clear at a glance: the temperature and humidity host and 3 sensors monitor the trend and comfort, and easily understand the current changing environment. Switch ℃/℉ freely. Real-time Monitoring: The measuring range of this digital temperature and humidity meter: indoor temperature (-20-70°C), outdoor temperature (-50°C-70°C), humidity (10%-99%). The accuracy is ±1°C (±2°F)/±5%. It will record temperature and humidity changes over time and provide you with Max/Min temperature and humidity data over the past 24 hours so you can keep abreast of their changes. 3 Sensors & Wide Range: This wireless thermometer and hygrometer combo is equipped with 3 wireless remote sensors and a main unit, which can accurately measure indoor and outdoor temperature and humidity. The sensor can be installed and used without barriers within 100 meters of the host. They will transmit the data to the host so you can see at