Founded in 1975, PT Hartono Istana Teknologi, better known as Polytron, is a prominent Indonesian electronics manufacturer based in Kudus, Central Java. The company produces a diverse range of consumer electronics, including televisions, audio systems, refrigerators, air conditioners, washing machines, and smartphones. Owned by the Djarum Group, Polytron has multiple manufacturing facilities in Java and exports its products to several countries, including Thailand, the Philippines, and Saudi Arabia. With a strong emphasis on innovation, Polytron remains a leading brand in Indonesia's electronics market.