These Code Hopping Transmitters are secure products utilizing KEELOQ encryption, operating in the 433MHz range
They do not feature any user-setteable Dipswitches.
The Transmitters are "Learnt" into an available memory slot of a compatible Reciever.
Due to the encrypted nature of these Transmitters, it is not possible to learn them into Receivers of other manufacturers, even though the same technology is used.