Insta-Trim boat leveler's electronic tab locator shows the position of your tabs. Two seperate lines of diode lamps accurately indicate the position of each tab. The screen is small, mounts on the dashboard, and is designed to match your rocker type controls in size and appearance. The detectors are rugged and attach easily and quickly to each hydraulic cylinder. The attached readout line runs up to the light panel with simple plug in connections. Insta-Trim electronic tab locators can be added to your existing boat leveler system, upgrading your system for a better, more accurate performance.