The Power Evacu-Trac is a versatile stair-climbing chair that can be used for emergency evacuation from below ground level to the exit level. It can also be used to provide a versatile stairway access solution for the elderly or those unable to climb stairs. A powerful motor and battery allow a small attendant to easily move a heavy passenger up and down stairs with the push of a button. Rubber tracks securely grip the stairs.
More information: http://www.garaventalift.com/en/products/evacuation-chairs/power-trac.html