The Useless Machine - Kit Easy to assemble No soldering required (Pre-assembled circuit board, use only a screw driver to attach battery and motor wires) Clean laser cut acrylic design. The motor and switch assembly is one piece (The motor, arm, both switches, LED lights and screw on battery terminals are all part of the same activation unit.) Two color LED arm lighting (Green LED while the arm is going up and red while it is going down)