Eclipse ESN CD players are car audio stereo systems equipped with the Eclipse Security Network. This network guarantees theft protection for the CD player and interface, as it requires a key CD be used anytime system power is reset. After purchasing and installing your Eclipse CD player, you select a key CD to be used to unlock and reset the system. If you need to reset the system, it can easily be done at home.

How to Reset An Eclipse ESN CD Player - 26