Epson TM-U220A, Dot matrix, 6 lps, 1.6 x 3.1 mm, 16 cpi, RS-232, RS-232 Epson TM-U220A. Print technology: Dot matrix, Print speed: 6 lps, Character size: 1.6 x 3.1 mm. Serial interface type: RS-232, Standard interfaces: RS-232. Mean time between failures (MTBF): 180000 h, Ribbon life: 1.5 million characters, Safety: UL, CSA, TÜV. Weight: 2.7 kg. Column capacity: 40/42, 33/35