Temperature & Humidity Sensor Independent Temperature Humidity Sensor Electronic Digital Hygrometer Detector Indoor Smart Home Thermometer Test Instrument Option A: Independent Version Option B: WiFi version APP Control Control the temperature and humidity detector through the mobile phone APP. When the temperature and humidity are too low or too high, it will push an alarm message to remind us. Set upper and lower limits We can set the upper and lower limit values of temperature and humidity in the APP. When the temperature and humidity are lower or higher than the value we set. The APP will push an alarm message to remind us to keep warm or prevent heatstroke in time. Intelligent linkage It supports intelligent linkage of air conditioners, fans, heaters and other home appliances. When it is linked to the air conditioner, you can set the air conditioner to automatically turn on when the temperature reaches a certain value. Create a comfortable environment for you. Product parameters Option C: WiFi version Built-in speaker Set the upper and lower limits of temperature and humidity in the APP. When the temperature and humidity are lower than or higher than the set value, the detector will issue an alarm, and the APP will push an alarm message. Turn off the backlight You can turn off the backlight through the mobile APP. so that you can have a good sleep. At the same time can save power. External detector It supports connecting external temperature detector. Supports switching between C and F. Product information Product include A: 1 * Independent temperature & humidity detector (LR44 battery not include) B: 1 * WiFi temperature & humidity detector (1.5V AAA battery not include) C: 1 * WiFi temperature & humidity detector 1 * USB cable 1 * external detection cable