Eos Converge Wireless Stereo Audio Receiver With Amplifier for iPod and iPhone Compatible with all iPhone & iPod models Audiophile quality digital multi-room stereo wireless receiver with high-quality digital 30W amplifier Connects to standard stereo loudspeakers Subwoofer output connects to powered subwoofer EOS GigaWave technology receives digital, interference-free wireless audio up to 150 ft indoors & 300 ft outdoors