Each Range Dial is given a random name (a combination of two foods) when it first connects to your device. This is to help you tell multiple Ranges apart. You'll notice that depending on which port you plug a probe into, it will add "Upper" or "Lower" to the name.
If for some reason you’re not cooking ham fondue, or want to label one probe "ambient", you can change this by long pressing on the name. Emoji work, too.