micW i436, external Mini Microphone for iPad 1/2, iPhone 3gs (and newer) and iPod touch, also calibrated measurement microphone, complies with IEC61672 Class 2 Sound Level, Meter standard, turn your iPhone and iPad into a real time analyzer or sound level meter, type: electret condenser, capsule diameter: 7 mm, principle of oeration: pressure, polar pattern: omni-directional, sensitivity (+/- 3dB): -44 dB (6.3mV/Pa), frequency response: 20 - 20000 kHz, S/N ratio: more than 62 dB, impedance: less than 2.2k, power source: plug-in power capability - plug and play, operating temperature -20° C to + 50° C, weight: 8g, connector: 3,5 mm 4-pole headset interface, includes no Apps or Software