No idea what 22 settings power is, however, as someone who has gotten electric stim for 8+ years, from multiple chiropractors, and always being "That guy" who tells them to crank it up.....I cant turn this thing up past halfway without being more than content with the power...For such a small and inexpensive device...the power output will shock you...no pun intended...or was it? ;D. Enjoy. Its a great device..
For an actual number I would have to look . The key pad has 9 suggested for different parts of the body . There are 3 at the bottom which I find the most helpful and powerful .
I do like the unit and it’s power !