Soundlong Electronics (Shenzhen) Co., Ltd., also known as Sound Long Co., Ltd., is a contract manufacturer of loudspeakers and sound boxes, established in 1998. Located in Changzhou, China, the company operates a factory covering over 20,000 square meters and employs approximately 700 staff. They specialize in a wide range of speakers, including automobile, computer, telecom, and TV speakers, as well as Hi-fi and home theatre sound boxes, offering over 400 types of speakers and 100 kinds of sound box systems. With six loudspeaker assembly lines, two sound box assembly lines, three voice coil manufacturing lines, and 23 punch machines, Soundlong Electronics has a monthly production capacity of 1.5 million loudspeakers and 100,000 sound boxes. The company holds ISO 9001, ISO 14001, ISO9002, and ISO/TS16949 certifications, reflecting its commitment to quality and environmental management. Soundlong Electronics has a strong international presence, exporting 98% of its products to Europe, America, and Japan, and has a history of cooperation with major international corporations such as Sony, Siemens, Thomson, Alcatel, Sharp, and National.