USB 4-Port Hub + SD Card Reader for PS3 Slim is dedicated to expand the USB port for PS3 Slim console and also enhance its card reader functions. It looks exquisite and is quite convenient to use just insert two USB plugs into the corresponding USB interface of the console and then you can use it. In addition, when playing games, you an insert and charge for original controllers simultaneously.( The total current cannot exceed 500MA.) Also, you can insert the SD card in to the SD interface to use on the PS4 console. It is very easy, convenient and indeed a necessity for gamers.