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WPS Pin is more like a secret code for safety purposes while traveling. WPS Pin, a unique 8- digit number, is used for establishing a wireless connection of the printer with the router. It is generated by the printer as a secret code. It is used for communication between your devices. Only a wireless router can be used as a device to communicate with their printer using the WPS Pin . The major advantage of generating a WPS pin is that it can avoid any form of intrusion from unknown users. Usually, the WPS pin is found on the printer screen.