Russound CAS44L Multiroom Controller Amplifier Kits Include Cas44 Controller-Amplifier, Four Keypads (KPL), A Cas-Rc and Two 1545.1 Dual Emitters. Control The Bass, Treble, Balance, Loudness and Volume From Any Keypad In The Home. For Ease Of Installation and Simplicity Of Use, The Cas44 Controller Does Not Require Any Programming.