DJI today released a Quick Start sheet for the FlexiMic they are now offering with the Osmo ( and existing customers will soon get a coupon to get a FREE one ). You can download the file here.
Sensitivity -32 ± 3 dB (0 dB =1 V/Pa)
Frequency Response 100 -10000 Hz
Signal-to-Noise Ratio 60 dBA
Pin Diameter 3.5 mm
Length 88 mm
Weight 4 g