This Speed control had incomparably low speed respond.
The Drag brake is programmable from 10,20,30,40%.
it is very useful in crawler walk.
The programming is very easy use, I just use 10min to read the setup guide to learn how it's work.
This speed control also support Brushed motor up to 19T for Forward and Reverse, and No limit T in Forward only.( I will test it late for 40T in my AX10).