Mp40 power supply problem？

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jacky.l

jacky.l

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The power supply of mp40 sold in China has the sound of current. Is it normal?

72a708b30f2442a700f0d950dd43ad4bd31302bb.jpg
 
Mine did not make noise
 
Depending of where you live you may get the buzz sound - Weird I know :rolleyes:
 

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