Just like OEM electrodes
The quality of these is great for $4. If you use it for a couple weeks and throw it out it's no big loss. I like the smaller electrodes because they are easier to place, and are easier to reuse. Make sure you wipe oil off your skin with alcohol before use or your skin oils will make the gel loose its adherence. Even when the gel is close to the end of it's life, it can be refreshed for a single use at a time with IceyHot/Bengay/or Aloe Gel. Basically moisture is what conducts the electrical currents.
Rating: 5 stars