A wheelchair is a mobility device designed to assist individuals who have difficulty walking or are unable to walk due to injury, illness, or disability. It typically consists of a seat, footrests, and large wheels that can be manually propelled by the user or pushed by someone else. Some wheelchairs are motorized, allowing for easier movement with a battery-powered drive. Wheelchairs come in various designs, including standard, lightweight, sports, and reclining models, to meet different needs and preferences. They provide increased independence and accessibility, allowing users to move around more easily in various environments.