Acoustic Audio AAVCS3C Home 3 Color Slide Speaker Volume Control Wall Mount Acoustic Audio AAVCS3C impedance matching 3 color passive slide speaker volume control, recommended power of 150 watts per channel Inputs and outputs accept up to 14 gauge wire, can be used with 4ohm, 8ohm, and 16ohm speakers, independent grounds for use with any amplifier White, almond and ivory faceplates included, mounting depth is 3.25", fits most deep single gang electrical junction boxes Use for in wall or in ceiling home entertainment, home theater, multiple room system, industrial sound system This listing and price is for 1 volume control and full instructions