LARGE & INTELLIGENT BACKLIGHT NON-CONTACT LCD SCREEN: Upgraded Temperature and Humidity Meter features a 3 inch backlit LCD display, When the object pass by the infrared sensing button from distance 5CM, the screen will light up for about 10s. The large square screen allows your eyes to browse the entire screen in a circle trajectory, make the visual center more clear.WIFI THERMOMETER HYGROMETER: Tuya temperature sensor connects with 2.4 GHz WiFi(NOT support 5G), You can switch the temp unit /, pre-set the alarm value and receive alerts via App. The easy to use App contains a dynamic temperature and humidity graph, you can get current and historic data via the appREAL-TIME UPDATE & ALWAYS ACCURATE: Indoor thermometer is accurate to 1,5%RH humidity accuracy. Real-time data update with massage, Manage the temperature and humidity in the most accurate way. The Smart thermometer powered by USB, NO Battery, please plugged in with USB cable all the timeVOICE CONTROL: Wifi temperature sensor compatible with Tuya smart, Smart life App, Alexa and Google Assistant. Room thermometer for home supports Alexa to ask for temperature and humidity, just say "Alexa, What's the humidity in here?"SMART SCENE TO TRIGGER ALERTS OR DEVICES: Digital temperature gauge make your home smarter. Set a smart scene to trigger alerts through events like high/low temperature, high/low humidity conditions. Alert will be sent to "Tuya smart " App when beyond preset value. You can also set a condition in the smart scene that is the air conditioner is turn on/off when the temperature reaches the limit value, or the dehumidifier starts working once the humidity is over higher