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yes they are. This is you need to undrstand how it's work. Your TV or DVD or whatever you try to connect, they azll have a romote controle number that they will never change. ex: if you TV remote controle number is 0143, you will alway use this number to be abble to controle it. o, if you have one remote then you change of remote because you break it or change it, you will still use this number 0143. This number is the code that represent the frequensy needed to work. if they do not match nothing will happen.