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 - The sensor can be used as a temperature and humidity data source for Tuya Smart, Smart Life, Amazon Alexa, and Google Home. You can perform many automated processes based on the data source. 4. Third-party voice support. The sensor supports Amazon Alexa and Google Home Assistant. You can view the current temperature and humidity by voice. After configuration, it takes 30 minutes to be accurate. Host power supply method:DC5V (Type-C) Sub-device power supply method:LR03-1.5V/2 x AAA battery(not included) Wireless type:Wi-Fi 2.4GHz/RF433 Temperature measurement range:-9.9-60 Temperature accuracy:0.6 Humidity measurement range:0%RH-100%RH Humidity accuracy:6%RH Product packaging size:13x10.5x4.7CM Product weight (one to two):185g Note:Rechargeable 1.2V battery may cause inaccurate power measurement. Colour:White Material:ABS Package Contents: 1 * Temperature Humidity Monitor 2 * Sensor 1 * USB Power Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.