Radio Shack In-Wall Stereo Volume Control (100W / 50W x 2) 10-step rotary control Adjust volume in another room Fits standard single-outlet electrical wall box What's in the box: Short screws (2), 100W In-Wall Stereo Volume Control (1), Owner's manual (1), Wall plate (1) Inputs: 2 x Screw Terminal(Spkr A, B), Outputs: 2 x Screw Terminal(Spkr A, B)