The IPK-1 is designed to provide easy access and convenient control to a room or zone using any of the following Russound audio systems: MCA-66, MCA-88, MBX-PRE, or MBX-AMP. While the Russound audio systems can be controlled by app, many users prefer having a dedicated keypad that is always available without having to pull out their phone, navigate to the Russound app, and then navigate to the room they want to control. The IPK-1 is designed to intuitively control your system without interfering with your lifestyle. For example, the volume LED’s only illuminate when the volume is adjusted. The status LED is designed to turn off when your audio system is not in use so that the LED will never light up a dark bedroom at night.