American Autowire Modublox courtesy light modules can link with other Modubloxes. Just click them together and wire them in to create your own custom accessory panel—adding accessories has never been easier! The modules allow courtesy lights to remain illuminated for a selected amount of time or until the ignition switch is turned on. At the end of the timed delay, courtesy lights will gradually fade to dark. An adjustment knob allows delay time selection from 0 to 60 seconds.