Mobility Stairclimbers and Posture Cushions. Powered stair climbers, Electric Powered Robot Mobility Stairclimber and Add-on Power Units for manual Wheelchairs, Vacuum Posture Cushions, Sensory Feedback and Stability, Single Operator Raizer® Lifting Device for Fallen Persons. AAT, The Powered Stair climber People are specialists in providing personalised disability access and social inclusion solutions to Occupational Therapists, Physiotherapists, end-users, and the general public. AAT also provide a wide range of Cargo Handling Devices for Delivery Professionals.