The special feature – the USB-Hub module was developed based on energy-efficient technology and coincides together with the computer system in the area of "green energy" technology. The input and four of the seven outputs can be switched on/off independently. When switching off of a port all signals (5V, + USB, - USB, GND) are physically separated via 2 relays with 2xUM. The seven- fold USB-Hub uses the USB 2.0 protocol.