Elektro is the nickname of a robot built by Westinghouse in Mansfiel, Ohio between 1937 and 1938. Seven feet tall, weighing 265 pounds, humanoid in appearance, it could walk by voice command, talk (using a 78-rpm record player), smoke cigarettes, blow up balloons, and move its head and arms. The body consisted of a steel gear, cam and motor skeleton covered by an aluminum skin. The photoelectric "eyes" could distinguish red and green light. It was on exhibit at the 1939 New York World's Fair. It reappeared at that fair in 1940, with "Sparko", a robot dog that could bark, sit, and beg.