The Atlas Mobile Stairlift is our newest innovation in transporting individuals using a wheelchair or patient transport device up or down a flight of stairs. Designed to accommodate a wheelchair or transport chair with seat sizes of 16", 18" or 20" widths. The Atlas offers Wheelchair users the added ability to remain in their wheelchair, reducing the need to transfer in and out of the wheelchair to the stair climbing chair. This unit weighs about 53 lbs. and requires a landing area of 44" x 44" if making a full 90-degree turn. To prevent injury, it is recommended that the operator be properly trained in the Stairlift's use, and that they first practice descending stairs without a rider. Included with the Atlas Mobile Stairlift Chair: 1 Battery and Charger and 1 Instruction Manual.