Hi Amigthalia,
Visit the link below:
http://h10025.www1.hp.com/ewfrf/wc/product?product=3986399&lc=en&cc=uk&dlc=en&task=
It has details about the HP Officejet 4500 Wireless printer.
If you have a different model of 4500 let me know will provide appropriate link.
Thanks and Regards,
MTAHER