Type: Smart Linkage | Baby Mode | Long Battery Life | High Precision Sensor Works with Mijia APP. Specification: Material: ABS+PMMA. Size: 43x43x 12.5mm. Voltage: DC2.5V- -3V. Battery: CR2032. Wireless Connection: Bluetooth 4.2 BLE. Measure range: 0°C-60°C. Temperature display resolution: 0.1°C. Humidity range: 0%一99%RH. Humidity display resolution: 1 %RH. Executive standard: QB/WSDJ 2401-2019. Quantity: 1Pcs. Features: 1. Home hygrometer, data can be clearly read in various brightness and angle. 2. High sensitivity and accurate sensirion from Switzerland, sense subtle change of temperature and humidity a breath away. 3. An expression to spell over comfort level, cute and simple. 4. Low consumption screen, a CR2032 button battery for one-year. 5. Built-in advanced Sensirion temperature and humidity sensor, temperature accuracy: 0.1 degrees, humidity accuracy: 0.1 percent RH 6. Via Mi app to switch on humidifier when indoor humidity is too low and  air-conditioner when indoors temperature is too high LED digital display, you can get temperature, humidity easily. Package included: 1 x Thermometer Hygrometer 2 1 x Wall Sticker 1 x Use Manual