VSI for Jazzy 1103, 1143, 600 and 610 powerchairs with seat lift. The VSI Controller is a fully programmable, integral electronic controller system that allows you to operate your power chair. It is designed to allow the user to have complete control over chair movement and speed. The controller has 5 flying leads, (5 plugs) as shown. Pride Mobility: ELEASMB5009, ELEASMB4664, CTLDC1324, ELEASMB5043 | PG Drives Technology: D50402