I am talking personally about the SOTA ones, Its kinda specific though as to get full benefits of Lysis using the BBBE device you need to ask for pure silver electrodes from SOTA as they are more efficient instead of the standard ones they give with the rubber probes. Its also something you have to wear from waking until sleeping once you work up to it to get the lysis benefits in my opinion anyway. It also has to be set quite high and i always liked to use mine at the highest setting but again you have to ramp up to it as going to fast is a silly mistake.