Microphone Ipc. This multi-purpose microphone has been designed for number of applications and experiments requiring the use and demonstration of audio input, including voice and music waveforms.The electret condenser type microphone is mounted in moulded plastic box with two standard mm output connectors, an on/off switch and power indicator.• Electrical Supply: 9V PP3 battery (supplied)• Dimensions: 68 120 36 mm • Mass: 0.15 kg• Sensitivity: -42 db• Frequency Response: 20 Hz to 20 kHz• Output Impedance: 2.2 kohm