This works as advertised and turns off the auxiliary devices a few seconds after the main unit has been turned off. Please note that the package does not include a power cord; instead it is designed for two sockets. I connected a short 3 wire extension cord to mine and it works fine too. Even though it's in a different room, my amateur radio activity (radio frequency output up to 700 watts) turned it on at times. A pair of ferrite filters on the input and output should solve this RFI problem.
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