Smart WiFi temperature and humidity sensor set: 2 sub-device temperature and humidity are standard, and you can easily monitor temperature and humidity data in real time anytime and anywhere through the Tuya APP. The WiFi host can pair up to 10 sub-device sensors (5G WiFi is not supported) Alarm function: Set the preset temperature and humidity range, and when the smart hygrometer thermometer detects a reading out of range, the alarm message will remind you through the mobile phone. Respond faster to sudden changes in greenhouse, bedroom temperature, etc. Precision Sensing Technology: Equipped with advanced sensors, this monitor delivers highly accurate humidity and temperature readings. Ideal for maintaining optimal living conditions, it helps you manage environments efficiently with reliable data. Voice Command Features: Enhance your experience with voice control capabilities. Compatible with popular voice assistants, this monitor allows you to check current conditions with simple voice commands, offering convenience and accessibility. Versatile Use in Various Environments: Perfect for greenhouses, wine cellars, and more, this monitor helps you maintain ideal conditions in diverse settings. Its robust functionality makes it essential for health and comfort in specialized habitats. About update frequency - The sensor uses a trigger mechanism. When the temperature or humidity changes to the set value, the sensor will report the data immediately. Usually, the data is updated once an hour. 1. High accuracy. The sensor uses top suppliers. It can guarantee high accuracy of measured data. 2. Application monitoring and recording. The sensor will monitor the temperature and humidity in the APP. You can view the changes in values on the APP. Record temperature and humidity changes on the APP and use graphical display. 3. Scene linkage