Compatible with 100A. Can adjust the welding time to the point and current soldering point, 0.02-0.1s interval, current 40%-100%, left front knob to adjust the time, right knob to adjust the current. For safety reasons, adjust the current knob to the potentiometer's customized plastic handle, the momentary pot slightly smaller. Connecting foot pedal with the city isolation, even if the pressure is safe. The pedal switch does not matter how long can only solder to the point once, others in the spot welding must be lowered to. Increase the anti-shake switch to prevent the foot when the switch when jitter caused by welding to the contact switch. Brand new. Voltage: 220V. Color: Green+black. Material: ABS+metal. Size: 78 x 50mm / 3.07 x 1.97inch. Package contents: 2 x Control board Time relay. 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 allowed measurement error is +/- 1-3cm.