Shimano ST-4400 is a shifting lever compatible with Shimano's TIAGRA series, designed to provide smooth and precise gear changes for triple front chainwheel and 9-speed rear cassette drivetrains. It features a dual control lever system, where the left lever controls the front derailleur and the right lever controls the rear derailleur. With its ergonomic design and easy-to-reach levers, the ST-4400 offers enhanced shifting performance and control for various riding conditions.