and humidity readings through the TuyaAPP. This smart device supports WiFi connection, allowing you to monitor and access historical data. Plus, the time and date automatically sync with your phone for easy tracking.Clear and Adjustable Display: Featuring a 2.8-inch TFT screen, this temperature and humidity monitor provides clear and easy-to-read information. You can adjust the screen brightness and toggle between Celsius and Fahrenheit units using the TuyaAPP.Long-lasting Battery: Equipped with a built-in 2000mAh high-capacity battery, this monitor has low power consumption and offers long endurance. No need to worry about wiring or constantly recharging. It's designed for convenience.Durable and Versatile: Made from premium ABS material, this 13-in-1 temperature and humidity monitor is durable and to shocks. It's perfect for various environments such as homes, offices, schools, warehouses, and agricultural settings. Enjoys reliable and accurate temperature and humidity monitoring wherever you need it.Specifications:Color: WhiteMaterial: ABSSubunit Quantity: 3pcs/5pcs(optional)Display: 2.8 Inch TFT ScreenTemperature Detection Ranges: -20-55, 1Humidity Detection Ranges: 0-99%RH, 3%RHMain Unit Voltage: 3.7VSubunit Voltage: 3.0VMain Unit Battery: Built-in 3.7V, 2000mAh Lithium BatterySubunit Battery: 2* AAA Battery(Not Included)Working Current: 180mAMain Unit Size: 89* 83* 36mm/ 3.5* 3.3* 1.4inMain Unit Weight: 135g/ 4.8ozSubunit Size: 59* 59* 19mm/ 2.3* 2.3* 0.7inSubunit Weight: 40g/ 1.4ozPackage Size: 195* 160* 72mm/ 7.7* 6.3* 2.8inPackage Weight: 3pcs Subunits: 380g/ 13.4oz 5pcs Subunits: 460g/ 16.2ozPacking List:1* Air Quality Monitor(Main Unit)3* Subunit1* USB-TypeC Cable1* User's Manual