The Tuya Smart Wifi or Zigbee Temperature Humidity Sensor Monitor is a compact device made of ABS material. It measures 70x24x19mm and weighs 30g. The sensor is powered by two LR03-1.5V or AAA batteries.With a Wi-Fi frequency of 2.4GHZ IEEE 802.11 b or g or n, this sensor accurately measures temperature and humidity. The temperature range is -20C to 60C, with an accuracy of 1C. The humidity range is 0 percent RH to 100 percent RH, with an accuracy of 5 percent RH.One of the key features of this sensor is its intelligent linkage capability. It can be programmed to automatically control other devices based on the ambient environment. For example, the air conditioner can turn on and adjust to a specified temperature when the room temperature exceeds 28C. Similarly, the humidifier can spray when the humidity drops below 20 percent RH.The Tuya Smart Wifi or Zigbee Temperature Humidity Sensor Monitor also offers convenient features such as device sharing. You can easily share the added devices with your family members, allowing them to monitor the ambient environment as well. The sensor can be controlled through a mobile app, where you can select the temperature unit as Celsius or Fahrenheit. It is also compatible with third-party voice control systems like Amazon Alexa and Google Assistant.The sensor comes with a low battery alarm, so you can monitor the battery level. It also provides temperature and humidity change curves, as well as historical data. The device is wall-mounted and easy to install. The package includes the sensor, an instruction manual, and a back sticker.Key Features:Intelligent linkage for automated control of other devicesDevice sharing with family membersTemperature unit selection in the mobile appCompatible with Amazon Alexa and Google AssistantLow battery alarmTemperature and humidity change curvesWall-mounted and easy to installPackage includes sensor, instruction manual, and back sticker Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.