BNIB --> Dayton Audio iMM-6 Calibrated Measurement Microphone
for Tablets & iPhone iPad & Android
calibration file included
https://www.amazon.ca/Dayton-Audio-iMM-6-Calibrated-Microphone/dp/B00ADR2B84/ref=sr_1_1/132-466?ie=UTF8&qid=1545322474&sr=8-1&keywords=dayton+audio+imm-6
turn any phone or tablet with a 3.5 mm jack into a laboratory grade audio measurement device
precision condenser microphone for critical measurement
for use with any smartphone or tablet with a 3.5 mm TRRS headset jack
true omnidirectional pattern with calibrated flat frequency response
headphone/line out pass-through jack for test signals or listening
kickstand feature elevates and angles device and microphone capsule
rugged construction with high-quality components