describe:1. High temperature, high humidity, low temperature and low humidity alarm: once the set temperature value is exceeded, the mobile phone will prompt an alarm2. Real-time monitoring: battery powered AAA1.5V*3 (battery not included), low power consumption, can be used for about 1 year according to the system default settings. The data update frequency is 1-120 minutes, you can select the update frequency as needed. The smaller the value, the shorter the actual battery usage time will be.3. Temperature unit switch: The sensor is designed with Celsius and Fahrenheit temperature display conversion functions. You can select the units to be displayed as needed. The speed of switching is related to the set data update frequency. You can first select the update frequency for one minute, then switch the temperature to the new unit after one minute, and then switch the data update frequency to the time you need.4. LCD screen display: The sensor uses LCD as the temperature and humidity display, and adds time and date display on the screen. Time and date are automatically calibrated.5. Third-party voice support: The sensor supports Amazon Alexa and Google Home Assistant. You can check the current temperature and humidity with your voice.Product parameters:Size: 60*63*25mmNet weight: 65gBox size: 80*80*45mmBoxed weight: 84gPower supply: AAA1.5V*3 (battery not included)Wi-Fi support: 2.4G IEEE 802.11 b/g/nTemperature measurement range: -10~55Temperature accuracy: 2.7Humidity measurement range: 0%~99%RHHumidity accuracy: 10% RH