The PRofec B-Spec2 integrates all the basics of an electronic boost controller, with additional useful options. Use the built-in boost gauge (psi or kPa) to tune in a Lo. & Hi. SET % to raise the boost pressure, then optimize consistency and response with GAIN % and adjust the START GAIN to set initial wastegate response. Also built-in are optional: Warning point, Warning limiter, and peak & last boost record. Compatible with integral and external wastegates and Greddy's RSS or SCC’s optional speed trigger.