Hi,anyone heard of Scalamobil?

" The Scalamobil is a portable stair climbing and power unit that
easily attaches to most wheelchairs....can be used on narrow stairs,
circular stairs ...over 300 steps on one battery charge ...variable
speed [up to] 16 steps per minute...lightweight and portable. "
You can know more details on : http://www.alber.de/en/products/scalamobil.php


anyone known what kind of motor Scalamobile uses?