Brainhole Technology Limited, an investment holding company, engages in the assembly, packaging, and sale of discrete semiconductors primarily for smart consumer electronic devices in the People's Republic of China, Hong Kong, Korea, rest of Asia, Europe, and internationally. The company operates through Manufacturing, Trading, Broadband Infrastructure and Smart Domain, and Strategic Investments segments. It constructs residential fiber-optical network; and provides survey, design, construction, and inspection services and unified operator access, as well as communication solutions for fixed line, broadband, mobile terminals, and WIFI coverages. The company also offers intelligent community and building solutions based on Internet of Things and cloud computing; smart home and digital home solutions comprising control system integrated with automatic control applications, computer network system, and network communication technologies; and smart city village solutions, as well as smart controls, security, and other products. Its semiconductor products include diodes, transistors, rectifiers, and transient voltage suppressors. The company's products are used in consumer and industrial portable electronics, such as mobile phones, display monitors, LED televisions, portable electronic equipment, and power supplies manufactured primarily by OEM/ODM manufacturers for consumer electronic brands. In addition, it is involved in trading of semiconductors sourced from third-party suppliers; provision of management services; holding of trademark; and trading of digital assets and listed equity securities. The company was formerly known as Top Dynamic International Holdings Limited. The company was founded in 2012 and is based in Quarry Bay, Hong Kong. Brainhole Technology Limited is a subsidiary of Yoho Bravo Limited.