qinyi electron is one of the biggest manufacture who mainly produces kinds of mics. like ecm ( electret condenser mic) ,digital mic etc. which are widely used on mobile, telephone, audiphone, headset, laptop, digital camera etc. our ecm characterize small size, wide sensitivity range and frequency response, high snr, low thd, fine sound , while the price of which is very low. bothstandardized or customized products are available. just depends on your own request.