This is a slidertype wall plate volume control for speaker systems with power ratings of up to 50 watts per channel and impedance ratings of 4 to 16 ohms. This slider control can be set to one of twelve positions; including the minimum off and maximum volume settings. The wall plate mounts into a standard singlegang; lowvoltage wall bracket not included and has inputs and outputs for one pair of stereo speaker wires 4 input connections and 4 output connections . It can accept speaker wire in sizes from 14 to 16 gauge and provides a frequency response range of 35 Hz to 20 kHz +0/2db at the full power rating of 50 watts per channel. Please note: This volume control does not include a wall mounting bracket. Support Files: User s Manual Aug 11; 2011