Citrix X1 Prototype Mouse Model: MOBTHTL This is a prototype X1 mouse. The color is likely a non-commercialized skeleton. I think it's quite rare. It's a rare item that isn't even available on overseas auctions. Although unused, there are some minor scratches from storage. There appears to be a Bluetooth switch on the bottom, and there's a space that looks like it's for a USB receiver when you open the bottom cover, but a receiver was not included from the beginning. I performed a simple operational check. I only confirmed Bluetooth connection to a PC, right-click, left-click, and scrolling. Please purchase only if you understand the above explanation and the images.