Rod: a well-known Australian audio equipment brand under Friedman Group, and Victory: an enterprise integrating research and development, production, sales and service of electroacoustic products; Sennheiser: a world-renowned manufacturer of traditional microphones and headphones, and a world-renowned provider of electro-acoustic products, system synthesis and service integration solutions; Sony: a world-renowned large-scale comprehensive multinational group, a pioneer in the fields of audio-visual, electronic games, communication products and information technology.