micW i456, external Mini Microphone for iPad 1/2, iPhone 3gs (and newer) and iPod touch, type: electret condenser, capsule diameter: 7 mm, principle of oeration: pressure, polar pattern: cardioid, sensitivity 3,2mV/Pa, frequency response: 100 - 20000 kHz, S/N ratio: more than 55 dB, impedance: less than 2.2k, power source: plug-in power capability - plug and play, operating temperature -20° C to + 50° C, dimensions: 9 x 55 mm, weight: 8g, connector: 3,5 mm 4-pole headset interface, includes no Apps or Software