I have the Biondo one, wired to trans brake. You can dail in the rpms you want, adjustable. When I was playing with the leave rpm’s it was nice, leaving at 4000 rpms car would be on back bumper, 2500 rpm work out perfect I love it for that reason, no chips to mess with. Think that what your referring to.
The things they hide, the way they spin things, the excuses that they make and the things they omit.