This 55 series version is similar to SYCON 55 series model of APFC in all respects except the display, the price and the size of the controller. It uses 2-digit 7-segment bright display for power factor indication. Two separate LEDs are used to give LEAD/LAG indication. It is smaller and lighter in weight than the regular SYCON 55 series model. This low cost version is very popular for smaller automatic power factor correction systems.