Phoenix Audio MT221 Daisy Chain Kit is used to connect any two or more Duet Executives unto a daisy chain, thus allowing for larger room coverage. The kit includes the necessary cable for connecting any two Duet Executives along with a single dummy plug. One kit is necessary for every additional Duet Executive added to the chain. Includes 11 Foot Length cable and a 3.5mm dummy plug that is needed to perform the daisy chain - Black