Compatible with 41ASCR Can adjust spot welding time and spot welding current, range 0.02-1s, current 40% - 100%, positive left knob adjusting time, right knob adjusting current. For safety reasons, adjust the current knob for customizationPlastic handle potentiometerThe potentiometer has a slight torque. The foot switch connection is isolated from the electricity market, even if the contact is safe. The foot switch can only be welded once every time, and the second spot welding needs to be loosened and stepped down. Increase the anti shake circuit to prevent incorrect spot welding when the switch contacts shake when the pedal switch is down. Turn on the power indicator and turn it on. Our SCR uses large core components, not cheap core. The plate should be added to tin at high current to output. After making the spot welder, the use not affect the electricity in the home. Colour: green Material: plastic, metal Package Contents: 1 * 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.