The GMI6027U-2C58DB with Electret Condenser Microphone Solder Pads RoHS is a small, omni-directional microphone manufactured by INGHAi. It has a sensitivity of -38 dB ±3 dB, a maximum output level of 0.2 V/Pa, and a response frequency of 20 Hz to 20 kHz. The microphone is self-polarized, which means that it requires no additional power supply, and comes with ready-to-use solder pads. It is RoHS compliant, meaning that it has met the European Union's directive for the production, use, and disposal of hazardous materials and substances. This type of microphone is commonly used for sound recording, speech recognition, and other audio applications.