I bought this thing about 20 years ago!
It has a heated endpoint, I plug it in, wait for about 5 mins and I can get a fully heated solo neck massage.
I also use it on the soles of my feet, my thighs, calves and shoulders - it does absolute wonders for post muscular recovery.
I can't recommend it enough.
I think the product has evolved somewhat now though, Amazon lists it as a massage gun
Definately worth adding to your workout recovery routine 👊🏼 Probably even worth investing in if you sit down at your desk at home a bit too much, get up - have a bit of a stretch, massage your muscles a bit!