I purchased switches and sockets from a local Shopee seller that had SIRIM labels. Even though the brands were of German, they were produced in China and Vietnam respectively. As I required a large quantity, I opted to purchase 13A multi sockets with USB from the 1688 portal, which were priced very affordably. I found some Chinese brands are equally as good, but I was particularly impressed with the quality of Bull. Upon opening one unit and inspecting the wires, I found them to be of good quality. I also acquired a meter checker to assess the workmanship of my electricians and those 13A multi sockets, which turned out to be satisfactory. In fact, all my Cat6 with built-in WIFI sockets and my PoE switches are from Chinese manufacturers. Of course, for heavy duty items such as 20A switches and 15A sockets, I used those with SIRIM labels.