Compact Omnidirectional Smartphone-compatible Microphone Do you want a calibrated measurement mic that's small enough to fit in your pocket? Are you looking for the ultimate mic for your mobile device? You've found them both in one microphone: the MicW i437L Lightning Microphone. It complies with IEC 61672 Class 2 sound level meter standards, weighs only about 1/3 oz., and is under 2 inches long. But this tiny mic is big on performance; it has a signal-to-noise-ration of >62dB and a frequency response from 20Hz-20kHz. And since it employs an electret condenser design, there's no need for external power. Plus, the i437L's Lightning connection means it's perfect for smartphone and tablet use. For electronic news gathering (ENG), SPL metering, Real-time Analysis (RTA), or scratch-track recording, Sweetwater recommends the i437L as an excellent mobile, smartphone-ready mic.MicW i437L Lightning Microphone Features: Smartphone-ready, ultra-portable omnidirectional condenser mic with Lightning connector Calibrated to meet IEC