Sandmartin International Holdings Limited is a Hong Kong-based investment holding company principally engaged in media and communications products businesses. The Company operates through four segments. Media Entertainment Platform Related Products segment is engaged in the manufacture and trading of media entertainment platform-related products for satellite products equipment. Other Multimedia Products segment is engaged in the manufacture and trading of other multimedia products, including components of audio and video electronic products. Integration of Signal System and Traffic Communication Network segment is engaged in the provision of installation and integration services of signal system and traffic communication network. Satellite Television Equipment and Antenna segment is engaged in the trading of satellite televisions and antennas.