Super useful to control pairs of speakers in different rooms as it will allow you to turn various pairs on or off independently (or all on at once).

The PSS4 lets you control 4 different pairs of speakers at the same time using a stereo receiver/amplifier with a maximum of 100 watts per channel. The speakers must have a minimum impedance of 8 ohms (as is the case for most speakers).

Check out the easy-to-find owner's manual on pyleaudio dot com - simply google "Pyle PSS4PSS6 manual"