JFT Automatic Inflatable Massage Seat Cushion for Wheelchairs, Office Chairs & Car Seats,Air Pads for Tailbone Pain Relief Black 17.7x16.1 Inches USB-Powered

["AIR MASSAGE PERFORMANCE: Advanced air cushion system with 20 individual air cells that inflate and deflate in alternating patterns for dynamic support, which can massage the thigh musules and promote the circulation of blood in the meantime. It can also effectively reduce the pressure from your buttockes and back, avoid the skin problems like bed sore, after long time sitting.","UNIQUE AIR BUBBLE DESIGN: This automatic inflation air seat cushion is made with high-quality, laminated TPU & Lycra materials in bubbles shape. The height of the air bubble is around 5cm, which leaves sufficient spaces between each two air bubbles so as to keep your bottocks and legs fresh, breathable and dry all the time.","EASY TO POWERED: Built-in air pump (w/o any battery) with automatic pressure settings allows personalized comfort levels for extended sitting periods. USB connector, cable length 1.5 meters. It can be powered by a portable power bank, car charger or a computer with DC5v input. So it can be widely used for office chairs, wheelchairs, home chairs and car seats.","WORKING PRINCIPLE AND DURATION: The air cell technology from this pressure relieving air seat cushion helps distribute pressure evenly while promoting better circulation during long sitting sessions. The automatic massage mode is activated when the switch is turned on and stops after a group of 15 minutes. Need to turn it on again for a new running.","If you have any concern or question about this automatic inflation pressure decompression/relieving seat cushion, please contact us through Amazon. We will spare no effort to answer your questions. ****NOTE****The working principle of massage is achieved through continuous inflation and deflation from the air cells. Hence the massage intensity is relatively light and soft which cannot achieve a stronger effect like those physical or human massages."]