Doctors have found that continuous movement of the spine increases flexibility and lubrication of the disks, preventing degeneration while relieving stiffness and easing pain.The Back Cycler inflates and deflates to create continuous movement that increases blood flow and keeps the spine in motion. Comes with 12 volt and 120 volt adapters (AC and DC). The remote control increases the pressure and frequency of the inflate/deflate cycle. Cushion measures 12" x 13"x 1.5". In Gray.