Limit of 5 per customer. For product inquiries and support, please contact Robosen Support at 1-800-298-1623 or support@robosen.com.   Estimated ship date subject to change, items may ship earlier or later than anticipated without notice Payment will be collected once item is ready to ship Introducing the world's first dual-form, bidpedal 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 even greater stability. Built in rechargeable Lithium-Ion Battery (2500mAh)