The cable is only intended for AV signals (image/sound), not for USB data or mouse connection. It is unidirectional and works e.g. from laptop to monitor, not for peripheral devices.
Yes, the amplifier is in the middle, i.e. after 5 metres. But beware, it's not a connection, it's just a black box with an amplifier inside, you can't connect anything to it.
We are very sorry about this.
After consulting the supplier information sheet, everything indicates that it should indeed be a 5A cable.
If you have not already done so, please contact our customer service department to check whether you have received a different model to the one you ordered: https://helpcenter.digitec.ch/hc...