? Enables wireless hookup for powered subwoofers & powered speakers;? Works with A/V receivers, Mac(R), PC, mobile devices & all other products with 3.5mm or RCA connectors;? External antennas enable extended 80ft unobstructed wireless range & up to 60ft obstructed;? 4 selectable channels;? Wireless 20Hz-20kHz;? Signal-to-noise: 93dB;? RF band: 2.4GHz;? Includes self-adhesive VELCRO(R) strips, transmitter, receiver, 2 external antennas, 2 USB AC power adapters, 2 USB cords, 2 RCA to RCA stereo patch cables, 2 RCA Y-adapter cables & two 3.5mm stereo to RCA cables;? 1-year warranty;