Aukey® Hub 4-port SuperSpeed USB 3.0 Aluminum 100cm USB cable included with Windows XP / Vista / 7/8, Mac OS, Linux (4-port hull Aluminium) (Electronics)
This is exactly what I wanted. And it's even smaller than what I thought: Along 9,2cm, depth 6,8cm, 3,2cm height. A blue LED lights when connected to the computer. The four USB ports "receiving" run smoothly. No need for external power. Below, p