The PD-0205-00 holds the battery for the Acousti-Phonic securely inside your guitar or bass. Mounts inside the control cavity with included self-adhesive foam tape.
The PD-0205-00 is the ghost battery clip and is used to hold the battery in place while inside your guitar or bass. It comes standard in the following preamp kits:
Ghost Installation Manual
Ghost Acousti-Phonic Frequently Asked Questions