Features: Brand new and high quality This is an economical, powerful, easy-to-use mechanical arm learning kit for Arduino. Interactive learning robot kit for teens to learn visual coding, construction, and programming. Control the robot arm with a computer connected via USB cable; send commands through the serial port to control it. The kit includes complete parts, easy to assemble – simply put together the robot arm with the included screws. The chassis is disc-shaped, making the manipulator's left and right swing more flexible and smooth. Fine cup bearings are used at the control joints, making the control not only more flexible but also ensuring the steering gear remains centered. Specifications: Material: Acrylic Weight: 213G Recommended Age: 15-35 Note: Due to the difference between light and screen setting, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 set acrylic robot claw 1 pack screws 4 X Metal Gear servos