It's standard on the 2032R and can be turned on/off. On the 10/2025R it's a mechanical add on, not sure about the 3E.Here are the four models: 1025R, 2025R, 3025E, and 2032R.
Mechanical add on.
No, meaning it's a mechanical cable, it cannot be turned on and off like the 32/38R. But, now that I have 200 hrs experience with my 38R I can tell you that I cannot remember the last time I turned it off, so not sure if it really makes a difference or not.it will function just like the 2032R?