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.
A smell is added to it when its used for stoves and such.   True Natural Gas does not have an odor, before or aâ¦fter combustion. The most common type of natural gas used is propane, in which they mix an additive to give it its tale-tell odor. yes Answer   Pure natural gas (methane, CH4) is completely odorless.