<http://schema.org/description>
"The EPP-MC Endpin Jack features a built-in preamp integrated circuit board and microphone pickup.  Includes battery clip and screws.  Endpin requires a 12mm diameter hole for installation."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.grizzly.com/products/Artec-Microphone-w-Preamp/H6058>