With built-in volume control, the NG-2 is the perfect choice for a piezo-electric system for classical guitar, reproducing the natural amplified sound of your instrument without modification. Unlike other pickups, the NG-2 is securely installed in the tie-block of the bridge, while being held in place by the tension of the strings. It can remain installed even when not in use. It is a passive system designed to work seamlessly with your favorite amplifier or to be colored through preamp selection. Two cables are included - connect directly with the 3m cable (1/8" to 1/4") or use the 1m cable (1/8" to female jack 1/4") with a safety clip, for connection with the cable of your choice.