I am a meticulous handmade creation. A classic tube microphone. Inducted into the TECnology Hall of Fame as an important milestone in the 125-year history of professional audio. Since my development in 1949 I have been the microphone of choice for generations of recording engineers and music artists from the Beatles to Frank Zappa. I am the microphone with an indelible character, smooth in-your-face presence and undeniably punchy tone, which sounds wonderful on any signal source, from violin to vocals. Specifications: Frequency Response 20Hz to 20KHz Output Impedance 30/50, 200/250 ohms, balanced Field Pattern Cardioid and Omni Directional Tube VF14 or EF14 Weight 21 oz Power Supply 110 volts switchable to 220 volts AC