Official product video and details of Tamiya 70256 Bipedal Walking Robot

About the Model
★This quirky robot strides forward through the side-to-side sliding motion of its central weight transfer unit, which contains the gearbox and battery case. As it slides, the opposite leg rises and moves forward. ★Change gearbox direction and limiter positions to add turns. ★An included guide rod can be fitted to help the robot avoid pesky obstacles like walls.
★Length: 85mm, width: 132mm, height: 107mm. ★Requires two R03/AAA/UM4 batteries (sold separately). ★Comes with a type 130 motor.