Samsung ML-2150 LASER 20PPM USB PAR. Maximum resolution: 1200 x 1200 DPI, Maximum duty cycle: 100000 pages per month, Standard printer languages: EPSON FX, PCL 6. Print speed (black, normal quality, A4/US Letter): 20 ppm. Internal memory: 16 MB, Maximum internal memory: 144 MB. Standby acoustic emission: 35 dB. Processor frequency: 166 MHz