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This Sima 4 pair speaker selector with volume control has the ability to select and play one to four or one to six speaker pairs simultaneously in any location around the home or office. Perfect for use with amplifiers up to 100 W per channel. Sleek speaker selector is compact in size to fit into any system and offers easy installation. Features indicators to show the status and easy to identify speaker locations by custom self-adhesive labels. Amplifier is secured by protection circuitry from low speaker impedance and overload conditions using auto-reset poly-switches.