Model from https://www.amazon.co.uk/gp/aw/d/B08FM4KS1R
We tried this once, but it didn't do much for our household's chronic pain (what did was the Curable app)
Some people say they're helpful though, and I understand lots of people buy or rent them for the early stages of labour, so hopefully it will help someone else! Four small and two large sticky pads are still unused in package.
TENS machine (Gay Village M1)
This offer has been gifted to someone and is no longer available.