This instrument is designed with the modern state of art technology incorporating LSI Electronic Digital cireuitry. The chamber for he animal is made out of clear Perspex sheet fitted with grill of nickel plated brass rods placed 3/16â apart. A variable shock of strength 100v, 50ma is provided. Which is built in the instrument. Also a four digit counter is provided which counts the movement of the animal, inside the Perspex chamber. The counter is provided with a