Polar pattern: Omnidirectional (for installation in the accordion)
Frequency response: 50 to 19,000 Hz
Max. SPL: 135 dB
Treble / bass controls
Jack-Out
Power adapter (9V)
Includng assembly instructions (Velcro strip is glued on the inside under the treble and bass top and the microphones - which also have hook and loop connection - attached) and feeding adapter (9V)