Item Condition: Like new Packaging: There is an original box included, but it is not in perfect condition. Paperwork: This item includes instruction papers This item has been tested and works great. This item is complete. Alternating-pressure inflating backrest stimulates circulation and flexes muscles to help alleviate back stiffness and fatigue. An internal air bag gently inflates and deflates to aid circulation to areas of the back that receive insufficient blood flow during prolonged sitting, relieving tired, sore muscles. The air bag also exerts a gentle pressure on back muscles and the spine, causing them to flex and reducing discomfort from inactivity. Slightly concave backrest promotes proper posture and provides support Tethered remote enables you to inflate and deflate the air bag manually Set it to inflate automatically every 40 to 90 seconds Select the preferred amount of pressure. Powered by the included AC or DC adapter, Backrest fits in nearly any chair and is ideal for long road trips or those with sedentary jobs 13 1/2" H x 12" W x 3 1/2" D.