Features1Data Clearly Visible: Equipped with 1.5inch LCD display, data can be read clearly at various brightness and angles, which is convenient and practical. 2High Sensitivity: The high temperature hygrometer has the function of high sensitivity and accurately sensing the subtle changes of temperature and humidity. 3Multi Function: Built in button battery, ultra low power consumption, one battery can stand by for a whole year. There is a super comfortable expression on the screen, which is convenient to understand the temperature and humidity. 4Advanced Sensor: Built in advanced temperature and humidity sensor, with temperature accuracy of 0.1 degree and humidity accuracy of 0.1%RH. 5Intelligent Application: By connecting for Mijia app, if the indoor humidity is too low, turn on the humidifier, if the indoor temperature is too high, turn on the air conditioner and LED digital display to easily obtain the temperature and humidity.SpecificationItem Type: Bluetooth Thermometer HygrometerMaterial: Thermoplastic PlasticsProduct Size: Approx. 4.2 x 4.2cm / 1.6 x 1.6inWeight: Approx. 31g / 1.1ozBattery Type: Built In Lithium Battery (Delivered With Built-In Battery)Battery Model: CR2032 (Quantity 1)Battery Capacity: 125mahBluetooth: 4.2Package List1 x Bluetooth Thermometer Hygrometer 1 x Sticker