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 WiFi connection is needed. Included in the package is a 3.5mm connection cable and a Y adapter, 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.