The 2x20 VFD Rear-Facing Customer Display is a USB-powered device that may be mounted to any of the four mounting locations located on the display head top, bottom, left, and right side of the touchcomputer. The specifications for the customer display are as follows: The 2x20 VFD Rear-Facing Customer Display is a USB-powered device that may be mounted to any of the four mounting locations located on the display head top, bottom, left, and right side of the touchcomputer. The specifications for the customer display are as follows: