Receipt printer, front output, direct thermal, Resolution: 8 dots/mm (203dpi), USB, RS232, media width (max.): 58mm, 60mm, Print width (max.): 54mm, 56mm, Roll diameter (max.): 120mm, Speed (max.): 250mm/sec, Cutter, Black Mark Sensor Interface: USB, RS232 Roll width in mm: 58, 60 Roll diameter in mm: 120 Type: built-in