Pneumatic Seat Height Adjustment allows quick and easy adjustment, regulates height of chair relative to floor. 360 Degree Swivel, chair rotates a full 360 degrees in either direction for ease of motion.Standard on every executive and task chair. 2-to-1 Synchro Tilt, back reclines at a 2-to-1 ratio to seat angle.Allows user to recline while keeping seat cushion relatively level to floor. Tilt Tension controls rate and ease with which chair reclines for different weights and strengths of users. Tilt Lock, locks out tilt function when chair is in upright position.