iFinity Wireless Audio Transmitter/Receiver for Subwoofers and Surround Speakers MAKES ANY SUBWOOFER WIRELESS: Install your subwoofer or active speakers without long ugly speaker wires - comes with a transmitter and receiver - the receiver can also connect to an external power amplifier - also great for installing speakers all over your house without drilling holes into your walls ATTENTION: This product DOES NOT work with passive speakers ADVANCED WIRELESS TECHNOLOGY: Stereo audio is transmitted in a digital format without audio compression (full CD quality) - free of static and interference - the wireless signal can travel through walls and ceilings to other rooms of your house - avoids interference by using adaptive frequency hopping - signal is not affected by wireless networks or cordless phones LARGE FREQUENCY RESPONSE: This wireless set transmits full frequency audio and can be used for full-frequency active speakers SUPER COMPACT: Both transmitter and receiver measure 2.6" x 2.3" x 1.1" only - easily hide away - totally out of sight MULTI-ROOM CAPABLE: Transmitter can pair to up to 4 wireless amplifiers - multiple transmitters can be used within a home - create distinct audio zones - pairing is a simple push of a button - transmitter also works with iFinity wireless speakers - 100% Risk-free 1-year Manufacturer Warranty with responsive easy-to-reach Customer Service Support