Unless you are in parking lot of restaurant or driveway of house with a baby monitor, you can forget about either of these. Very low power devices.
Almost true, depending on the receiving equipment can improve reception. Yeah, I had prior experience with like McDonald's, and a few others, but I'm realizing putting aside the low power is they are up in the other range of 2.4 ghz. As a child, and mischievous use to interfere with McDonald's, change the order, or enjoy the chatter between the employees. There was a local McDonald's in near Rutherfordton NC, lister of them cause I lived near, and one day was getting an order, hear them say disrespectful comments towards me, and I brought it up to their management which from then on didn't repeat over the air, but between yells, lol! Not all is the same, some devices perhaps a longer distance but meanwhile shorter. Thanks for your response.