Robotic arm edge Kit this Kit features a Gripper that can open and close, a wrist motion of 120 Degrees, an extensive elbow range of 300 Degrees, a base rotation of 270 Degrees, and a base motion of 180 Degrees. The arm has a vertical REACH of 15 inches, a horizontal REACH of 12.6 inches, and a lifting capacity of 3.5 oz. (100G). other features of this robotic arm include a Search light design on the Gripper and a Safety gear audible indicator on all five gear boxes to prevent any potential injury or gear breakage during operation. Note: supports windows OS. (32-Bit versions). requires: (4) d-cell batteries, not included.