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Includes 130 experiments to teach the basic principles of electricity, electronics, physics and magnetism. Comes with built-in speaker, 7-segment LED display, two fully integrated circuits and rotary controls. It includes everything you need to build an AM broadcast station, electronic organ, strobe lights, timer, logic circuits and much more. Easy-to-read, illustrated, lab-style manual included. Requires six "AA" batteries (not included). Mfr. #MX-906.