I don't want to put anyone off but the last time Aldi were selling these I was in the queue behind a bloke who was returning his as it kept losing the channels. obviously he's been unlucky but I thought it was worth mentioning to remind folks to check them out at home before they go.
The external USB device merely refers to a flash drive / external memory to record/ pause TV.
To get HD channels in HD you would connect to a HD ready TV via the HDMI cable supplied.
If your TV is not HD ready then there is probably an adaptor to scart or composite (red white & yellow) inlets.
Reception would be fine in most of UK but I suspect you would need to invest in a larger dish of travel to Europe.
Guy.
------------- It's only an expensive hobby when it's parked on your Drive....use it, love it , live it.
We bought one of these but took it back as we do a lot of camping in more remote, hilly locations (i.e. in the highlands and places where digital signals and mobile receptions are poor) as the output wasn't strong enough. We got a portable system , with dish receiver and finder in of all places B&Q with a stronger signal. downside is it's not so compact but was cheaper than Aldi, either £29.99 OR £39.99 but if you camp in or around cities or towns that aren't surrounded by hills the aldi one would be adequate. Just check the output you need