Wasion Holdings Limited, an investment holding company, researches, develops, produces, and sells energy metering and energy efficiency management solutions for energy supply industries in the People's Republic of China, Africa, South America, Europe, rest of Asia, the Middle East, and internationally. 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 meters, smart gas meters, and ultrasonic calorimeters; various 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, as well as system solution services, communication terminals, and heat meters. The company also offers high voltage switchgears, smart switchgears, circuit breakers, power distribution automation terminals, electrical and electronic devices for power quality control, and smart distribution systems, as well as engineering, energy-saving services, etc. In addition, it provides smart power distribution devices and energy efficiency solution services; and single-phase and three-phase power meters, as well as develops, manufactures, sells, 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 Sheung Wan, Hong Kong. Wasion Holdings Limited is a subsidiary of Star Treasure Investments Holdings Limited.