This is an electret microphone, supplied with phantom or battery.
In overhead or instruments do not dlivrant too big a sound pressure (wood, strings).
With a coupler on / off (due to the power supply).
Available in torque, delivered in a plastic case with stand and Bonetti

OVERALL OPINION

I bought a couple for my daughter - 14 years - wants to be ing sound!
I test voice speaks, trs correct. Not breathing, level dlivr trs correct.
At 58 euros per couple (sic!) Is unbeatable.
For the use intended is to say qq'un who wants to "get your feet wet" by recording the girlfriends of the conservatory is gnial.
I will test anyway with other instruments.
To be continued ...