1970s technology appears to be 3 times the price of a WiFi switch though :) (...not including 16USD delivery...) Do clappers hear through doors and across diff

1970s technology appears to be 3 times the price of a WiFi switch though :) (...not including 16USD delivery...) Do clappers hear through doors and across different floors? E.g. in bed upstairs and light is on downstairs? Plus would one clap not turnnoff everything that hears a clap, and not just the thing you want off but leave other things on? And can it auto clap itself off/on at certain times when you are asleep/not there? Can it hear you clap when it is at home and you are in your car/at work? And only 300% as expensive as a WiFi switch? Bargain. But you know, when my hands are full I can just put everything down and rub two sticks together to make a fire just fine. The power of humanity's intellect and dominion over nature is a wonderful thing and making fire is a privilege that not all mammals have that I plan to use for as long as I can - 4000 BC's technology to the rescue </sarcasm to illustrate a point> So much technology could easily be done "the old way" (fire to oil lamps to candles to gas lamps to electric lamps for example all make the room bright I'm the darkness), but it makes things simpler/more convenient/easier/etc. This is one of them IMO