NG-2 the logical choice for musicians wanting to professionally amplify the natural sound of their nylon stringed guitars without modification. Utilizing the tension of tuned strings, the NG-1 piezo installs safely and securely on the classical or flamenco guitar tie block. NG-1 is a passive system designed to work flawlessly with your favorite acoustic amplifier or colored via your preamp of preference. Detachable 3' lead cable with 1/4'' female to 1/8" male jack included.