A brilliant machine that lets you take card in many parts of your premises is named a Portable oneand this uses a transmission between the cradle which in turn calls with ethernet or phone
Most people who use this are pubs or cafes which need this type of machine since they must allow others to use cards when dining at their table, however, it can be for many other purposes.
This kind is mainly for people who must accept cards on the go and is called a mobile one, this only requires a connectivity with a network for you to use it. This is the one which can be taken out and carried so you can allow cards across Britain and you will not require a static line.
The last one is the Desktop one that is for persons which need to receive card in defined places next to power point and a phone or internet.