Rdjumpdjo 4X Guitar Pickups Acoustic Electric Piezo Transducer Microphone Contact for Guitar Violin Ukulele Mandolin Banjo

Drill a hole from inside the body, loosen -pin jack nut,insert it to the hole and tighten the nut Very easy to install and sounded good through several different amps, No Soldering Required, No Battery Required Pre-wired piezo mic save time , easy to install, convenient to use You can attach the piezo in or on your build, drill a hole and mount the jack With the advantage of being to interfering external sounds and not be influenced by sound reflections from nearby objects