The GMI4527P-2C-46db with Electret Condenser Microphone Through Hole RoHS is a high quality, omnidirectional microphone designed for applications that require high quality sound recording. It features a built-in FET preamp and a cardioid polar pattern, making it perfect for recording vocals, speech, and other sound sources. The microphone is RoHS compliant and features a through-hole mounting design for maximum flexibility. The GMI4527P-2C-46db is manufactured by INGHAi and has an Output Impedance of 2.2 ohms, a signal-to-noise ratio of 66db, an avarage sensitivity of -45db, and a frequency response range of 30 - 20,000 Hz.