Very unique synthesizer features 10 adjustable notes, variable pitch, variable speed, flashing LED and individual or flowing notes. Make "robot" sounds, space war, computer effects, etc. One of the most unusual kits! Circuit features three ICs and 12 trimmer resistors. Size of board: 2 13/16" x 4". Operates from 9V battery (not included). Complete with all parts, PC board and instructions. Skill Level 2. This kit requires soldering of components to the PC board while building.