WPS Pin is a unique 8-digit number that the HP printer generates for wireless connection with routers. It is only compatible with wireless routers. WPS Pin works in the same way as a secret code between your devices. This WPS Pin will keep your printer safe from unauthorized users such as your neighbors and hotels. For your knowledge, this WPS Pin technology will be adopted by all printer companies in the future. So look for the printer's WPS pin and connect it wirelessly.