This is an old version of Elektrosluch, currently replaced by Elektrosluch 2

ELEKTROSLUCH is device allowing one to listen to electromagnetic fields.

It consists of an electromagnetic ‘microphone’ and amplifier for use with headphones or with other instruments.
It runs on one 9V battery.

ELEKTROSLUCH devices (electromagnetic microphone and amp) are no longer for sale. Check newer version, Elektrosuch 2.