Zebra ZQ500 mobile printer D-Ring swivel belt loop (comes with velcro belt loop attachment). Alternative to a standard belt clip. One piece connects to the user’s belt and one piece (D-Ring Adapter Belt Attachment) attaches in lieu of the belt clip on the ZQ500 Series, so you can easily attach and rotate the printer to the hip. COMPATIBLE PRINTERS: ZQ510, ZQ511, ZQ520, ZQ521.
Detailed Specs
Zebra Mobile Printer Accessory Guide.pdf
https://www.thermalprintersupplies.com/content/product_downloads/zebra/Zebra Mobile Printer Accessory Guide.pdf