Make your harps sound golden.The legendary 520DX Green Bullet harmonica microphone features a volume control knob at its base that lets you easily make adjustments during a live performance. It sports an attached cable with a standard 1/4-inch phone plug for connection to a high-impedance device. High-impedance, omnidirectional Frequency response 100 Hz to 5 kHz Volume control knob Rugged, dynamic cartridge with excellent response Comes with 1/4 inch connector