This is a very inexpensive but most effective way to create a whole house audio system. Each station has its own controller where you can pick your audio source and the volume you want without affecting other areas. I am very pleased with the quality of the unit and the features. If the keypad doesn't have the correct IR codes the MCS-2A controllers can learn from a remote control. Over all I am very happy with the product and the service provided by a1Components. The turn around time from ordering to being at my front door was very fast.