These are universal remotes, only work with KEYDIY KD Devices to generate many different car keys. 

The B series are for car keys that the Transponder /Chips are separate form the remote side and only contain remote part. You have to add the Transponder yourself or use the transponder from your old key. 

The NB series are the ones that have Transponder on the Circuit board and use for so called "integrated car keys"  CAN systems, such as Vauxhalls, Fiats , Peugeots ect .    

If you look at these items you already know what these are used for, how are used and for what purpose. However , if still have any questions , please feel free to ask before purchase as I would not accept any returns!!