Specifications: *This is a great switch for miniative air compressor *It can help save electric power of air compressor < p>*Easy to install and convenient to use *There is a red button ON/OFF switch *Automatic control. Automatic loading / unloading *Four female air inlets with approx. Thread diameter 0.4 inch / 11 mm *Maximum tension: 240V *Current: 15A *Pressure range: 90-120 psi *Case Dimension (LxWxH): Approx. 130 x 82 x 52 mm (5.12 x 3.2 x 2 inch) Package includes: 1 air compressor control unit Note: the data is manual measurement, please allow 1-36cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.