Yeah, it has been a huge source of humor around here too- 'Sorry honey, can't do that right now, stimulating my bone' and so forth.
It is an ultrasonic transducer that the manufacturer claims heals bone fractures better / faster / more fully. That said, there is little evidence that it works. My Dr. does not normally prescribe them but in my case, he said he wants to give it every chance possible to heal (again, ominous words IMO). So, twice a day, I strap it on and stimulate away. :-)
It has been tough though- from the day Julie game me the unit and went over its usage: so many, many jokes in there that I could barely graze on. Oh yeah, it comes with a gigantic bottle of lube too (seriously). Anyway, I finally cracked when she said the penetration pattern is about 30 degrees wide and goes 8" deep: I said we could probably line people up and do a 'mass stimulation' if I was not afraid of where my wrist might end up or what it might end up against in the group of people with broken.... stuff.
Brian
Haha! Just noticed the, "bone simulator" comment! LOL