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 the Semiconductor Business, Broadband Infrastructure and Smart Domain, and Strategic Investments segments. The Semiconductor Business segment is involved in the sale of electronic goods and electrical parts and components. Its Broadband Infrastructure and Smart Domain segment provides broadband infrastructure construction services, promotes broadband services and smart domain solution services, and operates leases for broadband infrastructure. The Strategic Investments segment trades listed equity securities. The company also provides semiconductor products, including diodes, transistors, rectifiers, and transient voltage suppressors. Its 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. Brainhole Technology Limited 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 operates as a subsidiary of Yoho Bravo Limited.