Tim, the SCT device is a flash tool, that allows someone to upload ecu files (in SCT format) into the device, from a laptop or pc. You can then flash this calibration into the vehicle. The first time you connect the device, it will read and store your original ecu program in you car before you can load one of up to three custom tunes that can be loaded into the handheld. Additionally the device will read and clear trouble codes, and at some point should have high speed data logging capabilities.
Please feel free to call me at the shop if you have any other questions.
- Chris
DC Performance: Proven Performance
310-841-6996