A stair lift is a mechanical device designed to help individuals move up and down stairs safely and easily. It consists of a chair or platform that travels along a rail installed on the staircase. Stair lifts are particularly beneficial for people with mobility challenges, allowing them to maintain independence in their homes. These devices can be customized to fit various stair types, including straight and curved stairs. Most stair lifts come with safety features such as seat belts, footrests, and emergency stop buttons, ensuring a secure ride. They are powered by electricity and can often be used during power outages with battery backup systems.