Wasion Holdings Limited, an investment holding company, engages in the research and development, production, and sale of energy metering and energy efficiency management solutions for energy supply industries in the People's Republic of China, Africa, the United States, Europe, and rest of Asia. The company operates through three segments: Power Advanced Metering Infrastructure, Communication and Fluid Advanced Metering Infrastructure, and Advanced Distribution Operations. It offers smart meters, smart water and gas meters, and ultrasonic calorimeters; meters and power quality monitoring devices; energy data collection terminals, load management terminals, and user management devices; and measurement automation systems and various application systems, services, and energy data mining. The company provides network interface card/modules, data concentrator units, communication modules, RF gateways, data repeaters, cellular modules, standalone cellular modems, and LoraWAN gateways; and system software solutions comprising universal device integration, meter data reading, prepayment vending management, key management, meter parameters management, HMPM, energy data integration, and smart network management systems. In addition, it offers renewable energy storage application products; and high voltage AC automatic reclosers, fault detectors, outdoor and indoor high-voltage smart vacuum circuit breakers, gas insulated ring main units, high voltage metal-clad switchgears, miniature circuit breakers, and miniature leakage circuit breakers. Further, the company develops, manufactures, and sells data collection terminals and related services; and trades in electronic components. The company was formerly known as Wasion Group Holdings Limited and changed its name to Wasion Holdings Limited in June 2018. The company was founded in 2000 and is headquartered in Wan Chai, Hong Kong. Wasion Holdings Limited is a subsidiary of Star Treasure Investments Holdings Limited.