Finhol Edge Mic String, condenser microphone for acoustic guitar, steel string or nylon string, also for acoustic basses or other acoustic instruments that have a soundhole where the microphone can be fixed, by the low weight and the small area of Contact impairs the Edge Microphone not the sound of the instrument, can be installed and removed in seconds, neutral balanced sound, characteristics of the acoustic sound of an instrument is largely retained, requires phantom power 9-48 volts, the necessary electronics to produce a balanced signal is in the XLR connector integrated, characteristic: cardiod, signal: symmetrical, impedance 680 ohms, output 3 meter cable with XLR plug, frequency Response: 50 Hz - 20 kHz, weight is only about 15 grams, including transport bag made of felt, made in germany.