Spot Welding Machine 9V 40A Current Adjustable DIY Controller Panel Time and Current Control Function 220V

A zero-crossing detection circuit to that the phase accurate. Specifications: Name: Spot Welding Tool Set Type: 9V 40A Voltage: AC220V Colour: Red Material: metal plastic Package Contents: 1 set x Spot welding machine control board Only the above package content other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.