Remote Monitoring and Real-time Data Logging: Wifi thermometer can do real-time monitoring work. You can preset the temperature and humidity value in the "Scene". Our thermometer works with Tuya Smart, Smart Life, Amazon Alexa and Google Home. Historical temperature and humidity data is stored for 2 years. Smart Link: When the environment changes, you can perform smart link at home. For example, if the ambient temperature exceeds 35C. the air conditioner will work automatically, or when the humidity is below 20 percent RH, the humidifier will spray. Voice Control: You can request the temperature and humidity through the Alexa Google Assistant smart speaker . One click will share the device monitoring with your family members, so they can also monitor the environment. Precise measurement: The temperature and humidity sensor uses a high precision and sensitivity. The temperature measurement range is -20C to 60C and the humidity measurement range was from 0 percent RH to 100 percent RH. Temperature measurement accuracy is 1C and humidity is 5 percent RH. And this wireless temperature and humidity monitor updates every two minutes for greater accuracy. Mini Size: Our WiFi thermometer hygrometer sensor measures 71 x 25 x 20mm, which is space-saving and portable. It's small enough to fit in potted plants, humidors, reptile vivariums and other small spaces. Meet your needs for every corner. You can use it for 1 year with new batteries.