Dongguan Yunmei Electronic Co.,Ltd is one of the leading intelligent charger ym-cz001-4u manufacturers and suppliers China with one of the famous brands, welcome to wholesale customized bulk 4-usb slot socket, 4-usb slot charger, usb intelligent socket with 4 usb slot made in China from our factory. 4-USB slot socket LED display shows current  Standard : GB17625.1-2012/GB4943.1-2011/GB9254-2008