Surge Protective Device (SPD)

The EU trademark “tongou” (Registration No. 018630309) is owned by Changyou Technology (Zhejiang) Co., Ltd. We position ourselves as providers of intelligent product solutions for high and low voltage electrical systems, taking on solving customers’ pressures and challenges as our responsibility and creating value for them. We utilize intelligent products to serve global customers, making life smarter and more convenient to benefit your life.