The SLK-1 Single Line Keypad is an in-wall Decora style single-gang keypad designed for individual zone control of an MCA-C3 or MCA-C5 Multizone Controller Amplifier. The SLK-1 uses a five character LCD to display the current source, volume level and system status. Designed for basic zone control, its white backlit, soft-touch buttons allow for easy access to volume, power and source selection as well as a zone specific favorite and simple source transport option - play/pause, previous and next.