This is a headrest-mounted tablet holder made by iKross. It's a car accessory that allows you to use a tablet in the back seat. It supports 7-12 inch tablets. It has adjustable telescopic arms. It easily attaches to the headrest posts. It has an aluminum height-adjustable monitor arm and is easy to install with a clamp. I haven't used it much and have been storing it at home. If you understand that this is a used item, please consider purchasing it. Thank you for looking.