Automatic Operation: Automatic inflation start, automatic zeroing, and automatic detection and adjustment of the desired tire pressure. Air and Water Function: The device allows for separate air and water connections and includes a 10-meter water hose reel for easy cleaning or adding water to vehicles. High Accuracy: High-precision gauge with a unique pressure sensor. Advanced Display: Large, clear LED screen for data display. Built-in Compressor: Features an internal, oil-free air compressor, eliminating the need for an external air source.