Speed • Up to 20 ppm in A4 (21 ppm in Letter) Processor • 600 MHz (A1500 CPU / M2022, M2022W) • 400 MHz (A1000 CPU / M2020, M2020W, M2021, M2021W) Printer Languages • SPL (Samsung Printer Language) Memory • M2022W/ M2022 : 128 MB • M2020W : 64 MB • M2020 : 8 MB Interface • Hi-Speed USB 2.0 • Network Interface 802.11b/g/n wireless LAN (Only M202xW) • Wireless model supports NFC printing. Toner Cartridges • Initial : 500 pages (Only M2021 for China is 1,000 pages.) • Sales : 1,000 pages