I was wondering what the heck is a Delco Loc II audio system? How do I know if I have it?

 

Delco-Lock II and TheftLok audio components have a user-programmable access code that must be entered to unlock the device and allow it to function. If thelock is enabled and power is interrupted (from a failed connection, disconnected supply, or stolen device) the device cannot be enabled again until the correct access code is entered.

Most TheftLok radios have the "TheftLok" logo on the faceplate, and have a digital display with several auxilliary push buttons.