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Certifikat proizvoda

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CQC-JD

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UL

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VDE-X2

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KC-JY

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ENEC-JD

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IEC--JY

TUV

TUV

Certifikat sustava

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ISO 9001 2015

IOS9001

IOS9001

IOS14001

IOS14001

https://www.jec1988.com/system-certificate/

ISO 14001 2015

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LOA tvrtke Polytech International INC.

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LOA tvrtke Yingdian (Shanghai) Supply Chain Co., Ltd.