Keen Ocean International Holding Limited, an investment holding company, designs, develops, manufactures, and sells transformers, switching mode power supplies, electronic parts and components, and electric healthcare products in Hong Kong and internationally. The company offers toroidal and EI transformers, steel core products, inductors for EV chargers, inverter inductors, PCB assemblies, power amplifiers, inductors, battery chargers, and C type core products. It sells its transformers and power supply products to manufacturers and trading entities under the Keen Ocean brand. The company was founded in 2000 and is headquartered in Tsuen Wan, Hong Kong.