This is the Labrador Retriever: a mobile robot designed to lend you a hand moving things around. It can be controlled with a phone or tablet or Alexa devices. This robot uses advanced 3D vision to guide itself around your home. It has a dual layer obstacle sensors on all 4 sides to operate in tight spaces.
This robot has self adjusting height from 25 to 38 inches. The Retriever can automatically fetch and deliver trays. Each tray can hold up to 10lbs of items. More information is available here.