Shenzhen Shengjiali Electronics Co., Ltd. was established in 2004, located at Building 6, Hongchuang Technology Center, Qiankeng Community, Fucheng Street, Longhua District, Shenzhen City, at 610701.801201B. It is a national high-tech enterprise with electroacoustic integration technology as its core, and has been recognized as a specialized and innovative small and medium-sized enterprise in Guangdong Province in 2020. Shengjiali focuses on the research and production of various MEMS speakers, inner and outer magnetic series, ultra-thin series speakers, and high-end headphone speakers. So far, it has been deeply rooted in the field of speakers for 20 years and is one of the most professional and rigorously inspected enterprises in the industry. The series of products independently developed by Sheng Jiali, including graphene waterproof noise reduction TIS Bluetooth earphone speaker, DLG waterproof noise reduction speaker, waterproof noise reduction high fidelity speaker, dual tone dual magnetic circuit high-frequency speaker, dual driver overclocking wide off-axis speaker, etc., have leading performance in China. The use of dual magnetic dual voice coil technology and ultra-high frequency technology has made up for the shortcomings in this field in China and occupies an important position in the headphone micro speaker market.