Specification: Shell Material: Plastic Color: White Product Size: 65 x 60 x 26 mm (2.56 x 2.36 x 1.02 inch) Communication Method: WIFI 2.4GHz Working Temperature: -10~+55°C 0~100%RH Power Supply Mode: DC 4.5V, 3 AAA batteries (not included in the product, customers need to bring their own) Parts List: 1 x Thermohygrometer 1 x Manual [WiFi Hygrometer Thermometer]Wireless transmission of data signals, remote monitoring of mobile phones, and online temperature and humidity reports can be sent to the host at regular intervals by setting. Radio transmission circuit and coding technology solve the problem of signal interference blocking. [High Accuracy]The LED display of the indoor thermometer and hygrometer has the characteristics of high resolution, high digitization and easy to read. [App Alerts]If the WiFi thermometer hygrometer exceeds the range you set in the smart life app, you will immediately receive an app push message. If the temperature and humidity are too high or too low (you can set it by yourself), the APP will receive an alarm push, and it will warn you that the temperature is too high. [Intelligent Linkage Control]Wireless temperature and humidity meter supports WiFi, Bluetooth, and Access Point connections, works with Alexa, Google Assistant, also supports Smart Life product linkage control (only 2.4GHz WiFi). Add the smart temperature humidity sensor to the Smart Life app in a few seconds, your meter is ready to use. You can put it anywhere or hang it up. [Multi-Function]With low voltage monitoring and prompt function. Ultra-low power consumption, long battery life. A variety of temperature modes can be adjusted, suitable for different scenarios. °C/°F can be easily switched through the app. Real-time data is displayed as a digital display of hours, days, months and years. The wireless thermometer and hygrometer products automatically send a signal to the application every 24 hours, and can save and export the data of the past 2 years.