The GMI4015-2C-30db is a high-quality electret condenser microphone module manufactured by INGHAi. It is RoHS compliant and consists of a pre-amplified microphone capsule, PCB, and two solder pads. This module has a low noise figure of 30dB, and is suitable for both speech and music applications. The microphone can be connected to an amplifier through the solder pads, and has a frequency response of 50-20kHz. The features of this microphone, such as its low noise, wide frequency range, and RoHS compliance, make it a great choice for many applications.