From Robosen Robotics Innovation. Introducing the world's first dual-form, bipedal walking robot. This is the most articulated robot engineered by Robosen with 34 small, yet, high-torque and high-efficient servo motors that activates seamless conversion, while ensuring stable and smooth movements. The 6-axis IMU sensors constantly monitor the robot's balance, delivering an even greater stability. Choose from Optimus Prime, Megatron, and Grimlock.