The GMI4022U-48DB with Electret Condenser Microphone Solder Pads RoHS is a microphone module manufactured by INGHAi. It is a unidirectional microphone module and is a great choice for recording, speech recognition, voice recognition, and other similar applications. It comes with four solder pads, making it easier to connect to your audio system or any other electronic device. It is compliant with the RoHS standards, which makes it a safe choice to use. The microphone module has a high sensitivity, making it suitable for long-distance recording. It also has a wide frequency range, providing accurate sound reproduction. In addition, it has low background noise, making it even better for recording applications.