Earthworks Audio PM40T, Piano Microphone, Retractable microphone system for mounting inside a piano, Not visible from the outside, Condenser Microphone, Polar pattern: Omnidirectional, Frequency range: 9 - 40,000 Hz, Sensitivity: 15mV / Pa (-36dBV / Pa), Max. sound pressure level: 148 dB SPL (input), Requires 48 V phantom power, Telescopic rod for variable placement, Includes transport case