Trance Audio Amulet External Controller Module, this is the module seen in the photo only. This was used with multiple Gracie Stands so the guitar could be moved seamlessly. Price is for each box. I found another module, so currently there are 2 available.The item "Trance Audio Amulet External Controller Module for Acoustic Guitar Pickup System" is in sale since Saturday, September 5, 2020. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Parts & Accessories\Other Guitar Parts & Accs". The seller is "calmusic" and is located in Martinez, California. This item can be shipped to United States.