Niles SPS-4 Speaker Selection System

The product in the image is a Niles SPS-4 (or SS-4) speaker selector system. It allows a user to connect a single amplifier or receiver to up to four pairs of speakers and independently control which pairs are active. & Here is some shopping information for the device: • Brand: Niles Audio a • Function: Connects up to four pairs of speakers to one amplifier/receiver • Features: Includes a protection circuit to prevent amplifier overload and separate left and right ground paths for compatibility with all amplifiers & • Power Handling: Handles up to 100 watts per channel RMS Excellent; like new condition No scratches, no marks, never been mishandled