The SSI-4 PLUS will allow the capture of data from 4 external sensors. These sensors can be frequencies such as engine RPM and speed sensors or 0-5V references like MAP sensors and pressure transducers. The SSI-4 PLUS may be used as a stand-alone system or integrated with other Innovate Motorsports MTS products to create a log chain. The SSI-4 is also a key component of Innovate Motorsports' Modular Tuning System (MTS). Using the SSI-4 PLUS's serial ports you can daisy-chain other Innovate devices such as the MTX-L, LM-2, LC-2, and TC-4 PLUS.