This little FM wireless microphone is just slightly larger than a quarter. It has a super sensitive FET electret microphone that picks up the slightest sound and transmits it to an ordinary FM radio 200-400 ft. away.
Sound quality is superb.
The microphone is powered by a 9V battery. These tiny little powerhouses make great baby monitors. You will be amazed with the quality of this unit. The wireless microphone shown above, fully assembled and tested. This is an option if you have never assembled anything like this before and want a unit already assembled for reference purposes.