The control panel of the spot welding machine is a controller which is independently developed for the DIY or the simple resistance welding. The principle of silicon controlled phase shifting triggering is adopted to adjust the time and the current to achieve the purpose of welding. Specifications: Material: PCB Color: Red Current: 40A / 100A (optional) 100A Thyristor / 40A Thyristor: Just Thyristor Power transformer: Just 1 AC 9V transformer Welding Pin: 3 * 100 Welding Pin Alumina Copper Foot Switch: EKW-5A-B Aluminum Foot Switch DKJ10-25 Connector: European Quick Fitting Cable Quick DKJ10-25 Connector Red Rocker Switch: Red Rocker Switch Fused Power Socket Item Size: Control panel: 80*60mm / 3.1*2.4 #34; Display panel: 40*35mm / 1.6*1.4 #34; Item Weight: 86g / 3.0oz Package Weight: 87g / 3.1oz Package Size: 80*60*30mm / 3.1*2.4*1.2 #34; Note: This version for mass production without flying version. The package contains the control panel, display panel, cable matching, red green button. Because of the ease of consumption of silicon controlled parts, easy to discriminate in the commissioning process, it is recommended that friends together spare parts, easy to replace. please choose your own. Package List: 1 * Main Board 1 * Display Board 1 * Cable