Dean Markley Artist XM Transducer Acoustic Pickup with 1/4" Female Hardwired Connector

Same great pickup as the Artist Transducer, but with a low-noise 24" cable terminating with a 1/4" female jack that connects to your guitar strap button. For use with any 1/4" cable or wireless device. The Artist XM installs in seconds to amplify any acoustic guitar into any amp, PA system or recording device. No drilling or modifications to your guitar are required.

It's a great pickup for Violin, Cello, Stand-up-Bass, Banjo, Mandolin, Piano, Horn or practically anything else you would ever want to amplify. They have even had a mechanic use one to pickup (pardon the pun) knocks and vibrations in engines. The bottom line is: if it vibrates, the Artist Pickup will catch the vibrations. You do whatever you want with them after that.