It is made up of laser cut acrylic or wood parts, powered by standard RC hobby servos, and controlled by an Arduino-compatible board.
The basic design is Arduino-controlled, using 4 servos, with 4 degrees of freedom. Three servos on the base control the main movement of the arm and the last servo on the top moves and rotates the object.
Using mouse to control uArm to play Cup Stacking via serial.
Now we are on Kickstarter, you can see more details about this robot here.