The IR-4650-BK is 4 ports USB 2.0 Hub. It has a 5 pin mini USB connector with a retractable cable. With just a pull of USB cable, it will retract back into the hub case. The 5 pin connector allows easy connection to any mini-USB device. The IR-4650 is designed for both data transfer and as a mobile device power charger if devices support USB charging. With one port in the front and three ports in the rear, and its 7cm cable length make connecting to devices convenient and easy. Its small compact size makes it easy to carry and store. The IR-4650 3+1 port USB hub with retractable cable is a must-have for any business traveler .