More on Amazon.com : http://www.amazon.com/gp/product/B002ATKVYE?tag=purrfectcatdi-20 <br /> <br />Cables Unlimted SPK-ROCK-DUO Audio Unlimited 900 MHz Wireless Rock Speaker Bundle (SPK-ROCK <br /> <br />2 channel selection for you to achieve the best possible performance <br />Phase Loop Lock circuitry automatically locks in and keeps audio signal clear and strong <br />900 MHz transmitter sends audio signals without speaker wire <br />Weatherproof for outdoor listening <br />Speaker can be up to 150 away from audio source
