The SSI-4 device adds 4 inputs to an MTS Log Chain, one of which can be used for RPM conversion. The SSI-4 may also be used as a stand-alone device for logging data directly into a laptop with the included LogWorks software or it can be used in conjunction with any other MTS compliant device. It is also a key component of Innovate’s MTS. Using the SSI-4’s serial ports you can daisy-chain other Innovate devices such as the XD-16, AuxBox (LMA-3), LC-1, DL-32, and TC-4. The SSI-4 includes the SSI-4 unit, program cable, patch cable (to daisy chain with other MTS compatible devices), mounting hardware, and CD which includes software and manuals.