The Coffee-Enema version I had used both 2500 and 30k and worked well with a fresh battery.
The difference is the the UZ produces constant power due to the adapter. I could feel the battery powered version drop off in just one day use.
For me this was about removing cysts that have formed in a few places and both work for this but the drop off in current on the battery powered version stopped working on these cysts too quickly.
While I was looking into alternatives, adding an adapter or rechargable batteries, I ran into the 3 months free trial page and for the costs of buying an adapter (only risk the restocking fee) I figure why not try the UZ instead.