I’ve been to two museums this week which included an Acoustiguide with the price of admission. These are pretty common nowadays; you may have used one. It’s a long handset with a keypad, LCD, and speaker; the unit is self contained (no radio or other networking). You punch in the number displayed next to the exhibit and it plays a recorded description. I’ve enjoyed using it, especially in crowded areas where it’s difficult to read what’s posted. Often I would go wandering off to another display or painting, still listening to the previous recording, maximizing my learning time. And of course I’d often punch in random numbers to see what I’d get. My only complaint is that it turns museums into more of an introverted activity. It’s harder to converse with the people you are with and point things out as you listen to your own guides. Maybe that can be worked around as people get accustomed to them. And some people go off on their own regardless. But it is altering the interaction that I enjoy when visiting museums with others.