"This accessory is designed for the SD-POS-VBM. It allows for a second screen to be attached in a back to back configuration. It features a Quick Attachment head for easy screen mounting / replacement and an integrated ball-joint mechanism for tilt / pan adjustment and rotation adjustment. It suits displays up to 44 lbs. (20kg) and comes with display mounting hardware."
This accessory easily converts the SD-POS-VBM single display unit into a dual back-to-back configuration