DSM4 (4) Zone Dual Source Speaker Selector with both individual A/B switches and on/off buttons per zone, Protection Switch Located on the Back Panel, 70 Watts with Protection Enabled, 140 Watts with it Disabled. Can be used with Impedance Matching Volume Controls (protection would be Disabled), Features Removable Input/Output Speaker Connectors, accepts up to 14 Gauge wire. Features Brushed Aluminum Face Plate, Warranty - Two Years