The OSD Audio ISS4 is a low-profile speaker distribution system with individual on/off selectors for each listening zone. It distributes one stereo speaker-level signal to four listening areas. This speaker selector controls 4 pairs of speakers and has a power handling capacity of 140 watts RMS per channel. The ISS4 also provides a Manual Impedance Protection Switch which allows a single amplifier to safely power several pairs of speakers. Installation is a breeze using the new European Style Removable Input/Output Connectors.