The functions of the Xiaomi Mijia Bluetooth humidity sensor monitor Digital LCD display: monitor data can be clearly read under different brightness and angle. Built-in advanced Sensirion temperature and humidity sensor from Switzerland with high sensitivity, sensing subtle changes in temperature and humidity from a distance. Cute Cartoon Expression to spell more than comfort level, very cute and simple. Low consumption: built-in CR2032 button battery for one year. Built-in Swiss sensor, very accurate, will not miss the temperature of 0.1 and humidity of 1% RH, it will remind you and your family in time High accuracy: temperature accuracy: 0.1 degree, humidity accuracy: 0.1 percent RH Works with Mijia APP: via Mi APP to turn on the humidifier when the room humidity is too low, and the air conditioner when the room temperature is too high. Flexible Placement: Comes with a wall sticker so you can place it anywhere you like. Can be set in advance in Mijia APP, automatically turning related devices on or off when it reaches certain temperature Design patterns for babies. When the temperature or humidity exceeds your baby's comfort, the Mijia app will automatically remind you and give you coping suggestions, hoping to give you and your family a smarter caregiver. Can be placed on desks, bedside tables, offices; can also be attached to the wall with the included wall sticker, and can also be hung on cars, backpacks, doors etc. through the hanging holes on the side of the fuselage Mjia temperature and humidity can store 3 months of data, temperature and humidity changes, the cloud can store 6 months