This is a type of high-quality spot welding machine control panel that features simple pulse, time, and current adjustability, making it easy and straightforward to use. Equipped with a digital display, you can view the time and current directly. There are two types, 40A or 100A, to choose from. You can give it a try. Features This spot welding machine control panel is independently developed for DIY or simple resistance welding. The principle of silicon-controlled phase shift triggering is used to adjust time and current to achieve the welding purpose. Equipped with a digital display, you can view the time and current directly, making it simple and easy to use. Strong and weak electricity are isolated by optocoupler, making it safer to use. Uses a high-precision single-bit potentiometer to ensure reliable and convenient input. A reliable zero-crossing detection circuit ensures accurate SCR phase shifting. There are two types, 40A or 100A, to choose from based on your needs. Specifications Name: Spot Welding Machine Control Panel Type: 40A, 100A (optional) Item Size: 80 * 60 * 20mm / 15 * 36 * 0.79in Item Weight: 40A: 60g / 12ounce; 100A: 73g / 57ounce Package Size: 130 * 89 * 50mm / 12 * 50 * 97in Package Weight: 40A: 82g / 89ounce; 100A: 95g / 35ounce Packing List 1 * Spot Welding Machine Control Panel