HONGKONG SZONE GROUP LIMITED, also known as SZone Group, is a manufacturer and trading company based in Shenzhen, China, established in 2005. Specializing in automotive parts and accessories, the company focuses on Tire Pressure Monitoring Systems (TPMS) for cars, trucks, and buses. Their product range also includes car power inverters, mini car chargers, GPS devices, mini PCs, mini projectors, and electronic gifts. With an R&D department and a production line, SZone Group offers contract manufacturing services and accepts custom designs. The company is ISO 9001 certified and exports 41% to 50% of its products to international markets across North America, South America, Europe, Asia, Africa, and Oceania. They operate with 5-10 employees and have an annual output value ranging from US$5 Million to US$10 Million. In China, they market products under their own brand "Haojie" with a network of agents and after-sale service sites.