Royer Labs R-121, Ribbon Microphone, Directional characteristic: Figure 8, Extremely low inherent noise, Ribbon element insensitive to heat and moisture, Ideal for guitar recordings, wind instruments, overheads and string instruments, Frequency range: 30 Hz - 15 kHz +/- 3 dB, Sensitivity: -54 dBv re. 1 V/pa +/- 1 dB, Output impedance: 300 Ohm @ 1 k (nominal), Maximum SPL: > 135 dB, Length: 158 mm, Diameter: 25 mm, Weight: 245 g, Colour: Nickel, Incl. wooden box and protective cover