The GMI4022U-62DB is an Electret Condenser Microphone (ECM) manufactured by INGHAi. It is designed for use in a wide variety of applications such as telecom, acoustic testing, surveillance, and public address. It features a high sensitivity, low power consumption, and a robust construction. It comes with solder pads for easy connection, and has a RoHS certification, so it is safe for use in various environments. It has a frequency response of 20 Hz to 20 kHz, and an impedance of 1.8k ohms, making it ideal for a variety of different applications.