Shenzhen Marquess Electronics Co., Ltd. was founded in July 2004, originating from the Japanese AOI Electric Motor Manufacturing Company as a joint venture specializing in the production of ECM (Electret Condenser Microphones). For 21 years, we have been dedicated to the production, research, sales, and service of noise-canceling direct microphones and microphone cores, demonstrating unique AOI expertise in both active and passive noise reduction fields.
link:https://www.ecmsupplier.com
SHENZHEN MARQUESS ELECTRONICS CO., LTD.