DoorDash unveiled Dot, a four-wheeled delivery robot that can travel 20 mph on roads, bike lanes and sidewalks while carrying 30 pounds.

The robot is currently being tested in Tempe and Mesa, Ariz., as part of the company’s autonomous delivery expansion efforts.

DoorDash also introduced a smart scale to help restaurants weigh orders and reduce missing-item claims from deliveries.

DoorDash Inc., the largest food-delivery app in the U.S., unveiled a delivery robot and a smart scale for restaurants, showcasing the company’s years-long effort to develop hardware.

DoorDash co-founder Stanley Tang showed off the four-wheeled autonomous robot, named Dot, at a gathering Monday for reporters at the company’s San Francisco headquarters. Dot stands 4 feet, 6 inches tall and uses a combination of

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