Watch this 77 pound robot tow a 9000 pound trailer

A company called Trailer Valet has just released a series of remote-controlled robots that can tow up to 9,000 pounds. They call them the RVR3, RVR5, and RVR9. Although they don't say what RVR stands for, the number apparently denotes its weight class. The RVR3 sells for $2,100 and can bear up to ...