Our products incorporate the latest assistive robotic technology with two methods used to ascend and descend stairs. The wheelchair lift and chair lift use rubber tracks. All products are battery powered, portable and can lift between 169 -180 kg. Most products weigh less than 27kg, with many fitting in the boot of a car. None require any type of personal installation and require little or no maintenance . All products come with a two year guarantee on the frame and one year for batteries.