Why you need the Shure 520dx Green Bullet Microphone • Instantly identifiable sound. This is THE mic for harmonica players. • Unique design allows the whole mic to be cupped by the user and not sound muffled. • Built-in volume knob makes quick volume adjustments a cinch. • Attached 1/4" cable lets you plug into your favorite amps, preamps, or pedals. • When used on vocals, this mic delivers a cool lo-fi effect. Add some distortion and you're in old-time-radio land. The Shure 520DX “Green Bullet” microphone produces the unique sound that has made it a legend among harmonica players. The 520DX features a volume control knob at the base of the microphone that allows musicians to make adjustments to suit their needs during a live performance. An attached cable with a standard 1/4-inch phone plug allows the microphone to be connected to a high-impedance device.