Key Features. Built-in high precision sensor to monitor temperature & humidity Elegant design with a 1.5″ LCD display Baby mode via Bluetooth Interconnect with another smart device via Bluetooth gateway Easily stick or hang onto the wall Low power consumption lasting up to 1 year. Easily monitor the temperature & humidity in your room with the Xiaomi Mi Temperature & Humidity Monitor 2. It comes with a built-in high precision sensor to monitor temperature & humidity with great accuracy. Its elegant design is complemented with a 1.5″ LCD display making it easy to see & monitor its readings. The monitor can interconnect with various other smart devices via Bluetooth & can be used to turn on certain devices like a heater or humidifier when the temperature or humidity reaches a certain level. The built-in Mi Bluetooth Hygrometer 2 has a built-in Swiss Sensirion high-precision digital temperature & humidity sensor which can quick & accurately detect changes in temperature & humidity & promptly remind you & your family. It even features a Baby mode which lets you know when the temperature or humidity exceeds the comfort zone of a baby & even give you suggestions for coping with it..