Required to sit,â¯talk,â¯or hear; frequently required to use hands to grip or feel; and occasionally required to stand, walk, reach with hands and arms, stoop, kneel, crouch, or crawl.â¯. Guided by our vision of creating A World Without Barriers, we develop cutting-edge solutions for smart home control, security, door and gate automation, access control, and more to achieve our mission of Simplifying Everyday Movements.