I have been using TENS for a couple of months for chronic back pain, sciatica and reffered hip/leg pain and was getting annoyed with the electrodes being fiddly/falling off and did some investigating and saw a few different versions but all similar.
When reading on here a week or so ago I read a suggestion for a Prorelax TENS belt; ever up for a bargain I looked around for prices as they start at £100! I eventually saw a prorelax 'fit for golf' belt on amazon which had exactly the same write up as the one named 'fit for life' but is just £20!!
So I ordered it hoping it was the same and sure enough it is.... Just with a couple of golfers on pictures. After trying it out, it is very comfortable and the electrodes are sewn into the belt which makes it easy to just strap on/off in seconds.
Hides well under clothes so very portable - very happy. So heres a link and hope some may find it helpful for pain.