No, the channels do not have to match. The only channel that matters is the master channel--it must match your rx. However, with the JR buddy box, the battery does have to be installed in the slave. You DON'T want to turn the slave on, but the battery has to be installed. I say this so that you will make sure a battery will come in whatever box you choose to order (If you order a used one off of Ebay!)