Wheelchairs are essential for mobility-impaired individuals, available in manual and powered types. Manual wheelchairs are self-propelled standard folding type for daily use, lightweight aluminum for travel, rigid sports frames for racing; capacity 250-500 lbs. Power wheelchairs feature joystick control rear-wheel drive for outdoor stability, mid-wheel for indoor maneuverability, front-wheel for rough terrain. Specialized types include pediatric for children, bariatric for heavy users, standing/tilt for posture support, all-terrain tracked for off-road. Key features offer pneumatic tires for shock absorption, adjustable footrests to prevent pressure sores, anti-tippers for safety, quick-release wheels for transport. Custom options address contractures, boosting independence.