Get the benefits of sectioning your layout and auto reversing without additional boosters. PM42 has 4 levels of short circuit detection sensitivity settings so you can use it with a wide range of DCC equipment.
 
The PM42 lets you divide the output of a single booster into four sections for auto reversing, or to isolate areas of your layout so only an affected area shuts down if a short circuit occurs. Each unit can run four sections from a single booster, in any combination of regular sections and auto reversing sections.