Ghost - Acoustic Midi for Nylon String Guitar The Acoustic MIDI system for Nylon Stringed Guitar includes:6 Individual ghost Acoustic MIDI Nylon pickupsBD-5100-00 ghost battery / jack assemblyBD-0077-00 ghost tone control preamp boardBD-0477-00 ghost Acoustic / Hexpander preamp boardBD-0512-12 Hexpander interface wiring harness (non keyed)BS-0077-00 ghost Pagoda shimBD-0515-00 13 pin mounting plateBD-0205-00 Battery holder