This module plugs into the SmoothBoost's Boost Control port allowing you to control peak boost through an external PWM system such as a Standalone ECU, Kaizen Relay module or a Nitrous Controller.  this will give you the ability to expand the boost control capabiliies of the SmoothBoost Active Bypass System to do Boost by Gear/MPH, Time, RPM, etc.
 
Accepts a PWM(-) input and converts it to a 0-5v signal. 
Recommended frequency of 30 - 200hz