A:
Some models have it. Not all. Best to look at the one you are interested in to make 100% sure. honestly though I live in Florida and humidity is the name of the game, but I never ever use mine. For me, the problem with a dehumidifier is we tend to leave it on all the time and this makes the air very very dry. While you may feel cooler, dry air can lead to nose bleeds and tends to promote more dust (no water vapor to weight it down and make it fall)
As for the 115v it is a standard wall type plug. It's a special cord with a breaker on it that makes it a 115v. No need for any special plugs or sockets.