Very solidly made speaker selector box for up to 4 zones. Includes manual. * Supports up to 4 Pairs of Speakers * Each Zone Has a 60 Watt, 12-Step, Transformer-Based, Stereo Volume Control * Features Direct Connect Removable Screw Down Terminals * Unique Suction Feet Assure the Selector Will Not Move When Room Selector Buttons Are Pushed * When Engaged, Rear Protection Switch Assures Safe Operation, Even by Those Unfamiliar with the System * Includes 100 Room Labels to Customize Any Application Power Handling: 125 Watts per Channel, Continuous Frequency Response: 20Hz - 20kHz Protection: Front Panel Button and Rear Override Switch Volume Control Power Handling: 60 Watts Volume Control Attenuation: 42dB Maximum Volume Control Switch: 12-Step "Make Before Break" Design Dimensions: (H x W x D) 13⁄4"* x 17" x 61⁄8"** (44 mm x 432 mm x 156 mm)