This mini USB hub has 4 USB 2.0 ports Every single with a max overall transmission hasten to 480 MBps. All four ports are powered thru the USB micro-B cable. there is also one on-off switch that controls the 4 USB https://alyshangtt213597.iyublog.com/29832780/adafruit-industries-usb-mini-hub-with-power-switch-no-further-a-mystery