Xtrempro 61048 2 to 4 Way Speaker Switch, 1 in 2 Out to 1 in 4 Out Pair Stereo Selector W/Terminal Clamps Metal Non-Slip Box - Black

2 or 4 channel stereo speaker control, allow conventional amplifier or stereo receiver to drive multiple sets of speakers, without the need for external impedance matching devices Ideal for low cost Distributed audio in residential or commercial sound applications Individual control of each speaker pair. Impedance constant at 4-16 ohms, 150w(per Channel), 300W max, Cable length: Max 164ft/50m Just hooked up to the stereo. No extra power supply needed Metal non-slip box, 5in x 3in x 1. 5in (2 way) and 9in x 3in x 1. 5in (4 way)