It has what feels like a solid metal plate at the back with two little elastic corners to (assumedly) go over your chair of choice, doubling as a hanger. Now I'm all for a hard massage, but this is very hard - so maybe put a jumper between you and rollers if needed - and I put it on my sofa-recliner (bear in mind I'm still reading the instructions, so that may not actually be ok to do). I am very surprised at the punch it packs, I honestly thought it would be quite weak, being so small, so I was stoked with the result. Don't recommend holding a coffee though, when the rotors went over my shoulders I spilt a bit on myself lol. The heat is in...view more