Custom Versions of RF600E/D
"Custom versions of the RF600E / D chipset are available, programmed with a unique ‘Manufacturers Key’ which means that the transmitter and receiver will respond only to other devices with the same unique manufacturers key. This provides a bespoke remote chipset for OEM applications".
I thought that once the decoder learns a particular transmitter, then it does NOT respond to any other encoder/transmitter...then, what is this concept of specific manufacturer's key?...any idea?