Spring Activated Sonics
The EF110M takes our popular Blackfly unit into the world of modular! With 2 springs from the original, a gain control, plus 3 types of output:. normal waveform, rectified, and envelope. And lastly, LEDs that are are set to indicate 1V, 5V, and 10V
http://www.electrofaustus.com/ef110m-blackfly-modular/
This Module is currently available.
$150