Wireless; Print from phone or tablet; Two-sided printing Print Black (normal, A4): Up to 33 ppm; Black (Duplex, A4): Up to 20 ipm Up to 1200 x 1200 dpi Powerful productivity. Seamless management. This printer is built for powerful productivity with fast speeds and reliable hardware, delivering effortless everyday use from wherever work happens so you can focus more on your business. Printing Secure printing Yes Warm-up time 55 s Duplex print speed (black, normal quality, A4/US Letter) 20 ppm Print speed (black, normal quality, A4/US Letter) 33 ppm Print resolution black 1200 x 1200 DPI Maximum resolution 1200 x 1200 DPI Duplex printing mode Auto Duplex printing Yes Print technology Laser Colour No Features HP segment Small medium business Replacement cartridges HP 139A Original Black LaserJet Toner Cartridge (~1,500 yield) W1390A; HP 139X Original Black LaserJet Toner Cartridge (~4,000 yield) W1390X, Country of origin Vietnam Printer fonts Scalable, TrueType Page description languages