Matter Smart Home Temperature Humidity Monitor E-ink Display Sensor BT Compatible Apple / Mi Home APP Remote Access and Automation Air Conditioner Humidifier Accurate real-time measurement BT thermometer and hygrometer with E-ink display, supports Apple /Mi Home APP, multiple installation methods, energy efficient, beautiful and practical. Features: E-ink display, clear and easy to read, like printed text on paper. Built-in Swiss sensor, accurate real-time measurement, temperature and humidity at a glance. Supports Apple /Mi Home APP, remote data viewing, activation of automation, convenient and fast. Multiple installation options, magnetic wall stickers, desktop brackets, built-in magnets, suitable for various places. Powered by CR2430 button battery, energy efficient, battery life up to 8 to 12 months. Specifications: Model: T(Thread+BT)/M(BT)（Optional）  Color: White  Temperature Measurement Range: 0 ~ 50°C  Humidity Measurement Range: 0 ~ 99.9%RH (No condensation environment)  Battery Type: CR2430 Button Battery  Screen Size: 55x55mm / 2.17x2.17in  Size: 74x74x14mm / 2.91x2.91x0.55in  Weight: 54g / 1.9oz Package list:  1 x Thermometer and Hygrometer  1 x CR2430 Button Battery  1 x User Manual