Only reusable a couple of times.
My husband needs to use the TENS machine daily for post-surgical pain.  He finds these larger electrodes to work much better than the 2 by 2 size.  The problem with these is that, although they are made very well, the stickiness lasts only 2 to 3 times.  If they don't stick tight they don't work and send out shocks.<br />We used the skin preparation and everything we could think of, but they still didn't keep sticking.
Rating: 2 stars