5-2-1® Compressor Saver® - Hardstart Device 3.5-5T CSRU2 | CE
Uses a multi-layer starting capacitor and a smart switch to provide a timed "boost". Installation Basics
The "5-2-1" name refers to the three wires——that must be connected to the compressor.
It can cut the time your compressor spends on high-amp startup by 30% to 50%.