SMART TABS - TRIM TAB SYSTEM , Designed for boats 10-22 ft in length with 8 to 240 hp engines. , The first and most effective automatic trim tab system provides better all around performance to even smaller boats with low hp engines. Even if your boat runs okay, SMART TABS will improve the performance of your boat more than you ever thought possible. , All you do is drive, SMART TABS do the rest!