CAir pumps are designed for use with the EHOB Waffle Chair Pad for wheelchairs and reclining chairs. With a CAir Pump, you'll achieve the perfect inflation every time. The EHOB WAFFLE Mattress Overlay is combined with the CAir Pump to inflate the overlay and adjust inflation during use. A "smart algorithm" programs with just one touch to adjust the level of inflation in multiple configurations. When the user leaves the overlay, the chair pad does not overinflate or become hard pending their return. If the user moves from lying flat to a 30º head-of-bed, simply push the button to add a few extra strokes of air.