It is very practical. Each switch is pre-wired, all you need to do is connect power and ground to the device and all switches are ready to use. Simply connect the power side to the switch you intend to use and ground it to any good earth source you like. The only thing I want is the master switch to kill or activate the party. I used mine to control the water tank heaters in my caravan. It would be nice to only toggle on/off for the whole group.
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