Brother HL-6050D, Laser, 1200 x 1200 DPI, A4, 24 ppm, Duplex printing Brother HL-6050D. Print technology: Laser, Maximum resolution: 1200 x 1200 DPI. Maximum ISO A-series paper size: A4. Print speed (black, normal quality, A4/US Letter): 24 ppm, Duplex printing