400V high-voltage LED dedicated input capacitance, using the U.S. imported high-precision constant current IC, independent 2N60 power tubes. This is not constant voltage constant current power supply, the output voltage will be based on your connected lamp beads voltage is automatically adjusted (if connected 9 3.2V lamp beads, then it will automatically adjust the output voltage to 28.8V), the circuit with overcurrent protection, short circuit protection, open circuit protection. Bad lighting power production using this probability thousandths less. Special Note: two white lines that group as an input connected to 220V, a red one for the output connected to that group of white LED lamp beads, red is positive.