OVNO Wood Contact Mic
Which is the materials sound by vibration? 
Wood Piezo is built with contact microphone to discover sound by vibration.
The sound of this contact microphone is very colourful in the low and middle frequencies, using wood as a natural element.
Is perfect for installations and experiment with differents surfaces, it's very hard resistance.
Made of wood 
Connection options: Mini Jack 3,5, Jack 6,35 or XLR

Mechanical Dimensions    
60mm x 60mm x 10mm  
EM Cable Length    2 meters