This does not print even close to 4500 pages
I have ordered 3 of these high yield print cartridges and none of them have been even CLOSE to the advertised number of pages (and I only purchase genuine brother toner). The printer starts giving you a message about being "low" on toner far before it is. You can cancel this but after a few times it locks you out and you CANNOT USE THE DEVICE until you replace the toner, even if the print quality is perfect and there is plenty of toner left. False advertising for sure. The smart chip counts pages and does not actually assess how much ink is used. So if you print 4000 blank pages you will throw out an essentially full toner.