This is a pre-wired Rod Piezo harness that includes a volume pot and Neutrik long-shaft mono output jack. Installation of this harness requires NO SOLDERING - all you have to do is drill some holes, connect the plugs and youre good to go! This harness includes 12" leads between the components so that you have plenty of slack to install them how you want in your box. The volume control is a 500KOhm audio-taper potentiometer. Pop this little harness in your acoustic instrument and get ready for some great sound!