Banggood

400W DC-DC High Power Constant Voltage Current Boost Power Supply Module its good and working well. good for COB chip LED. both current and voltage adjustable

no problem.

Damage Product not in Working condition. The potentiometer is not working the in put is 9V and out put is not going more than 2.5 V.The out put voltage is not stable every time fluctuating volt I hav update the picture of this item. packing is not good just wrapped up. please advise what to do with damage item. please help or advice me how to Repair or fix this damage item. where is the service center please provide Details. Tracking information is good and accurate Thankyou to Banggood Team.

Посылка пришла быстро, за 21 день, отслеживалась хорошо! Немного снизил оценку за не хорошо отмытый флюс с обратной стороны платы и, конечно же, хотелось бы немного дешевле. А, в общем, очень хорошо!

Also a little generous in the specification department... 200W and she gets alarmingly warm! Could use a fan.....

semplicemente perfetto ....come previsto i vostri articoli non deludono mai GRAZIE !!!!!!

looks good , not tryed so far

Looks good. I have not tested them yet.

The input & output terminals are too small to accomodate suitable wiring.

ok