Product Features Small Diaphragm Condenser Cardioid Polar Pattern High SPL Handling Extended Frequency Response In the Box Audio-Technica AT2021 Cardioid Condenser Microphone Stand Clamp Soft Protective Pouch Overview AT2021 Ideal for home studio and live applications, the low-profile AT2021 offers an extended frequency response, high maximum SPL and wide dynamic range. The microphone is outstanding for acoustic guitar, overheads, piano and group vocals. Its low-mass element offers a superb transient response.