The wireless sensor uses a transmission frequency of 433.92 MHz; A host can connect up to 3 wireless sensors at the same time (a host is only equipped with one transmitter, if you want to realize this function, you need to purchase additional sensors); Host temperature measurement range: 0°C (14°F) ~ 60°C (140°F); Host humidity measurement range: 10% RH ~ 99% RH; Sensor temperature measurement range: -40°C (-40°F)~60°C (140°F); Sensor humidity measurement range: 10% RH ~ 99% RH 【Multifunctional Weather Station with Large LCD Screen】 The weather station uses a large color LCD screen, all important information is clear at a glance: indoor and outdoor temperature (Celsius and Fahrenheit) / humidity, maximum / minimum temperature and alarms, weather forecast, comfort, time (12/24 hours), calendar, week (Seven languages to choose), daily alarm and snooze function and switching and moon phase. 【Temperature and Humidity Forecast Function】 Collect real-time data based on outdoor sensors, and then track related variables based on the Indoor Outdoor Wireless Sensor, including changes in temperature, humidity and atmospheric pressure, to generate more accurate forecasts for your location. 【Radio Weather Station with 2 Outdoor Sensors】 The weather station can display real-time weather from up to 2 wireless sensor channels at the same time time; the wireless range of the remote sensor can reach 60m; you can not only put them in a room or basement, but also place them outdoors. At the same time, the screen has a built-in sensor, which you can use to detect indoor temperature and humidity data. 【Two Power Supply Modes】 The Thermometer Hygrometer is powered by an adapter (included) or AA batteries (not included). When using the battery, the screen will automatically turn off after about 15 seconds to save power. If you use the AC adapter, the screen will remain on. At the same time, when you use the battery, the screen automatically enters memory mode and automatically saves all the content you set. 【Your Personal Weather Assistant】 Our indoor weather station is different from the weather forecasts you see on TV or the internet. Weather forecast products have separate sensors that can collect real-time data outdoors. They are based on weather stations that track specific weather variables, to generate accurate and personalized forecasts for your location. Size: 172*132*23mm Delivery quantity: One piece