RF remotes generally work this way: The originating signal is sent from the remote as RF (radio frequency.) In the case of the MX-950 in my theater that's 418MHz, a very stable and reliable frequency band.
By nature, propane is clear and contains no scent at all. For safety purposes propane. companies add a substance known as ethyl-mercaptan to the propane fuel. Ethyl-. mercaptan has a strong rotten egg, or skunk-like scent, which allows the consumer to. smell it in the case of a leak.
Guys, its simple. Your engine oil oughta smell like fuel. This is becos it makes contact with the inner walls of the cylinder and is scrapped off by the oil ring. Prior to that, the inner wall had traces of fuel ex inection and combustion. Engine oil gotta smell like fuel at some point.