You Can Choose freely among 5 vibration massage modes and turn on the heating function so that you can work in this ergonomic chair comfortably even in winter.Backrest of this rolling chair adjustment angle in 90° to 135°, you can lock the backrest in the favorite position as needed.The seat height of this home desk chair can be flexibly adjusted between 20 inches and 24 inches to suit the needs of different heights.The Thick scalloped upholstered and premium faux fabric, keeping you sit much longer without feeling tired.360° rotatable seat with 360° turning wheels of this computer chair to help you move around easily. Please contact us if you have any questions.