Lexmark T640 T642 T644 Black Toner Cartridge 21 HDD capacity_2000 GB Device interface: RF Wireless +

Device interface: RF Wireless + Bluetooth 4

and muscle memory achievements

1 Gen 2 interface to transfer data both ways at amazing 10Gb/s

Plug-and-play simplicity

Prime B550 series adds the nuanced details that improve every experience

Lexmark T640 T642 T644 Black Toner Cartridge 21 HDD capacity_2000 GB Device interface: RF Wireless +Lexmark T640, T642, T644 High Yield Print Cartridge. Black toner page yield: 21000 pages, Printing colours: Black Lexmark T640, T642 and T644 supplies are designed for the highest quality output, performance and easy installation, from the first page to the last. Lexmark T640, T642 and T644 supplies are not compatible with other Lexmark Printers. For use with Lexmark T640, T640n, T640dn, T640dtn, T642, T642n, T642tn, T642dtn and T644, T644n, T644tn,