Apex Medical Sedens 500- Alternating Pressure Seat Cushion with Portable Pump. Designed to reduce the risk of pressure sores from long times sitting. Excellent for Lower Back & Tailbone Pain Relief- Fits Wheelchair, Office Chair, Driver Seat - Rechargeable battery built in, with charger. $400 on Amazon--Also available a couple of walkers, canes and other such items.
https://www.amazon.com/Medical-Alternating-Pressure-Cushion-Portable/dp/B08B8Q17M1
$150 for it. Located near Marine Park near Sheepshead Bay area. Include your number for quicker response.