Patent Mechanical Arm --> NO adjustable in different weight with monitor while moving up&down, Monitor keep the same view with the eye. One time to stop any where. Light, small, havey loading No gas
Patent Mechanical Arm --> NO adjustable in different weight with monitor while moving up&down, Monitor keep the same view with the eye. One time to stop any where. Light, small, havey loading No gas
Patent Mechanical Arm --> NO adjustable in different weight with monitor while moving up&down, Monitor keep the same view with the eye. One time to stop any where. Light, small, havey loading No gas