:The Goertek B4012AP422-003 is an Electret Condenser Microphone with Through Hole installation and RoHS compliance. This microphone is designed for low-noise, high-gain, and wide-frequency applications. It features a built-in pre-amp, high sensitivity, low distortion, and high S/N ratio. The package includes a built-in microphone element, a shielding enclosure, and a metal mounting frame for secure installation. This product is suitable for use with consumer electronics, portable audio/video devices, medical equipment, and industrial applications.