[Timely Alert] You can freely set the upper and lower limits of temperature and humidity that suit you, and open the APP to push reminders. Once the limit is exceeded, an alert will be sent to you immediately, and the reporting record will be . [Backlit screen] Short press the top button to turn on the backlight, allowing you to view the screen clearly at night. The backlight automatically turns off after ten seconds and is turned off by default, saving power and protecting the environment. [Ultra-high precision] Collect and update temperature and humidity data in real time. The temperature tolerance is within 0.5C and the humidity is within 5%RH. Products are pre-calibrated to accurately measure temperature and humidity. You can also manually calibrate to improve data readings when product placement or environmental factors affect data accuracy.Our sensors also have a device offline reminder function, which can help users understand device status in a timely manner [Voice and mobile APP control] You can use voice control through Alexa and Google Home Assistant to know the current temperature and humidity. Connect to the Tuya APP on your mobile phone and simply configure it to start your smart home journey and free your hands. For example, you can say "Alexa, what's the temperature in the bedroom?" [Historical data statistics] The APP device panel supports the temperature and humidity history recording function and displays multiple data lines at the same time, which can intuitively display data change and allow users to more clearly understand the temperature and humidity of their living environment. (Historical data can be exported and downloaded to your mailbox) The sensor has Celsius and Fahrenheit temperature conversion functions,you can choose the unit to display according to your needs.Through the device sharing function,everyfamily member can easily enjoy the convenience of the sensor through his or her mobile phone.Set up groups for products and control multiple devices with a single from the app. 1. If you own other Tuya smart products, such as a Tuya humidifier, set a humidity condition in Add Automation to link the humidifier. Once the humidity is too low, the humidifier in your room will start working. 2. If the equipment that requires linkage control is not a Tuya product, such as large such as air conditioners and fans, then you can control it by linking the Tuya remote control, such as our series of infrared remote controls, setting a temperature condition, linking the infrared remote control , when the temperature reaches the extreme value, the remote control will automatically start to turn on/off the air conditioner for us. Let you experience a more humane smart life. Power:0.4W Type-C input:5V1A Working humidity:10%RH-90%RH (Measurement range:0%RH-99%RH) Humidity accuracy:5%RH Precautions: 1. Bluetooth is only used for network signal connection and cannot be used alone. WIFI+Bluetooth is more stable. 2. For indoor use only. 3. When the sensor is powered on for the first time or the environmental conditions change, it needs to be left alone for half an hour to adapt to the temperature and humidity of the surrounding environment. Only after the sensor is stable can it provide accurate temperature and humidity measurements. Colour:Black Material:PC+ABS Size:4.1x7.3x2.5cm Package Contents: 1 * Temperature and hygrometer sensor 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.