Features: Brand new and high quality This is an economical, powerful, and easy-to-use mechanical arm learning kit for Arduino. An interactive learning robot kit for teenagers to learn visual coding, construction, and programming. You can control the arm robot with a computer connected to the arm robot via USB cable, then you can send commands via the serial port to control it. The package includes complete parts, easy to assemble, just put the robot arm together with the provided screws. The chassis is disc-shaped, allowing the manipulator to rotate left and right more flexibly and smoothly. Fine copper bearings are used at the joints, which not only makes steering more flexible but also allows the steering gear to be centered. Specifications: Material: Acrylic Weight: 213G Recommended Age: 15-35 Note: Due to the difference in light and screen settings, the color of the item may be slightly different from the pictures. Please allow a slight dimension difference due to different manual measurements. Package includes: 1 Set Acrylic Robot Claw 1 Pack of Screws 4 X MG90S Metal Gear Servos