Great switch. I use it to drive 120VAC from the power supply and use the 5V circuit from the power supply to light the LED in the switch. This is not the standard way to connect the switch, but customer service helped me fix the problem. The +/- terminals light up the LED. Contacts NO, NC and C switch the power. As long as you don't connect NO to + you can have independent LED and power control. See wiring diagram in product photos. According to other reviewers, the customer support is excellent. I've been using it for three weeks now and haven't noticed any problems. I plan to buy it again.
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