It is back electret type, with high resistance to vabratens, high signal to noise rate. Widely used in the cassette recorder, wireless microphone and voice control circuits.
These are great for the sena smh 10 bluetooth headsets.Hard wired into the board to replace the mic they came with.Works beautifully
Thank you so much!
What a poorly made product.The wiring is so thin its nearly impossible to use with a breadboard.Even after pushing back the plastic casing on the wiring the voltage across the microphone doesn't even reach a volt when flicked.The data sheet isn't provided here which is a HUGE RED FLAG.I really should have known better.