ICY BOX IB-HUB1700-U3 7-port hub with USB Type-A interface and power supply, black
This question is now settled! Generally, seven USB ports are sufficient to cover the plug-in requirements of all possible devices. Seven times data transfer rates of up to 5 Gbit/s are available here.
Conveniently, the power supply unit is included in the scope of delivery. It supplies 5 V/3 A, i.e. a total power of 15 watts. This is quite enough to supply all seven ports with sufficient energy.
Dimensions(WxDxH): 125x30x20mm
Weight: 85g