Not so good
It does have 3 settings: one with blue, red and white light.  However, you could not tell if there is any difference.  Plus, it doesn't heat up to 50 degrees celsius.  It took 40 minutes before it even got to 40 and then it stopped there.  even if you change settings, nothing changes.  I suggest you buy something a bit more expensive for your neck pains and back pains.<br />But it might be good for your cat.
Rating: 2 stars