"Robotic Arm Wired Controlled allows young engineers to learn the basics of robotic technology! The innovative robotic arm has an extensive range of motion through all pivot points. Its an introduction to Robotics and Mechanical Engineering that will excite young and old engineers. This STEM robot has five motors that power five joints for optimal control and movement. Develop problem-solving skills while assembling and while having fun! Lifting capacity: 3.5oz (100g). Horizontal reach 12.6in. (320mm). Vertical reach 14.96 in. (380mm).Base rotation range 270°. Base motion range 180°.Elbow range 300°. Wrist motion range 120°.4 D batteries required, not included. Tools that might be needed: diagonal clippers, a screw driver, safety goggles. Elenco Teach products are based on STEM activities (Science, Technology, Engineering, Math) to teach and encourage kids in their development, all while having fun! Perfect for future engineers ages 12+."