Features: 100% brand new and high quality The use of STM8 industrial microcontroller control center. Strong and weak electricity through optocoupler isolation, safe operation. The power line and the foot switch line adopts the screw free fast connection terminal, more convenient and reliable. Input time, current using high-precision single potentiometer, to ensure reliable input, convenient On-board power supply, state, foot, trigger indicator, working state clearly visible. Package Includes: 1 Set Spot Welder Control Board Specifications: Material: ABS Voltage: 220V/110V Current: 100A/40A Power Source Size: 3.7x3x1cm/1.46x1.18x0.39inch note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you place order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you