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.
Propane is a cleaner burning fuel emitting fewer greenhouse gasses. Propane is not a greenhouse gas in its natural state. Propane has higher octane rating reducing the tendency of knocking, evident in some petroleum/diesel engines. Propane is much cheaper to purchase than gasoline or diesel. Propane is nontoxic and not detrimental to soil or water if accidentally spilled.