Wister Alternating Air Mattress is an alternating-pressure air mattress overlay with an adjustable electric pump for pressure redistribution in people with limited mobility or prolonged bed rest. It supports a pressure-injury prevention plan but does not replace repositioning, skin checks or clinical assessment.

Components and specifications:
Bubble-cell air mattress overlay, connecting hoses and an adjustable mains-powered pump.

Directions:
Place the deflated overlay flat on a compatible mattress, secure the end flaps, connect the hoses without kinks and run the pump until fully inflated. Adjust pressure to the user's weight and clinical plan, then keep the pump operating as instructed.

Important precautions:
Use with a clinician-led pressure-care plan. Inspect skin regularly and reposition as advised. Do not use damaged cells or tubing, block ventilation or place near heat, liquids or ignition sources. Do not use for a person whose weight exceeds the rated limit printed on the device.