NOTE: We have DIY kit or Finished board (Optional)
◆ DIY kit ---- All parts need you to solder and test it.
◆ Finished board ---- All parts have been welded and tested OK. (And set well the high voltage as you have chosen value. the low voltage default will set at 12.6V. if you want 6.3V. youself can adjust the blue adjustable resistor.)