The HR 4 is a humanoid robot developed by the Canadian robotics company Dr Robot. It is the 4th android creation of Dr Robot in its effort to build a dynamic walking robot that costs about just as much as a typical personal computer. The robot still has its predecessors' original DURAS architecture, which is the customary platform for all mobile robot designs of the company. It has good balance and can stand and walk straight. It makes use of pincer grips to efficiently pick up and hold objects.