Are you asking about hardware or software or both?
Discussion
This was a thing I had to learn a few months ago. It was painful. LOL
I agree. I had never thought of it because that's how it was explained to me in the beginning but that is not what it is or should be called, at all. Lesson learned. That being said, I use all of them (Except Blue) but Sparrow is my favorite. It looks rather intimidating at first but once you figure it out it's very clean and easy to use. And from what I understand you can use it with any and all of your signing devices.
Thank you.