1、9 LEVEL ADJUSTABLE: Spot welder control board support 9 level power accurate adjustment, digital tube real time level display, very convenient 2、MULTIPLE FUNCTIONS: Used as spot welding machine and voltmeter. Built in 12 bit high accuracy ADC, voltage measurement accuracy up to 0.01. The voltage test range is 12‑14.6V, which automatically display the voltage tage when connected to the power supply 3、CONVENIENT TAPE MARKING: Spot welder controller board with double sided outlet for easy spot welding. With marks, which is not easy to make wrong connections 4、INTELLIGENT AND CLEAR: Intelligent CNC spot welding machine adopt high speed single chip microcomputer, intelligent program, real time display of battery voltage, spot welding strength can be seen 5、PRACTICAL AND EFFICIENT: Super thick copper pipe, 12AWG wire, alumina copper spot welding needle with large current capacity and durability, greatly improve the efficiency of spot welding