The WS-A-Link s/r kit allows wireless audio broadcasting and receiving from one audio system to another. With an operational range of 100 feet, NO Bluetooth or Wi-Fi connection is needed. Included in the package are a 3.5mm connection cable and a Y adaptor, along with Micro USB charging cable. Each A-Link unit can be set to either SEND or RECEIVE audio signal. The Wet Sounds A-Link now allows multiple systems to play simultaneous and truly rock the party.