Attractive, compact, water resistant and easy to install. The TPI helm display accurately shows deflection percentage of each trim tab, and the LED brightness is adjustable for any lighting condition. Works with all Bennett Trim Tabs.A1101EX is an external line connection actuator used in cases of total inaccessibility inside the transom. Unlike the standard actuator, the external line hydraulics enter the transom by means of external tubing above the waterline.