The sp500 series is a highly sophisticated low cost dot matrix receipt printer it is capable of an incredibly fast receipt output printing 40 columns onto 76mm wide paper at 4 lines per second and onto 58mm paper at 75 lines per second the sp500 features a bi directional logic seeking mechanism resulting in an exceptional through put out pacing its nearest receipt printer competition the compact footprint of just 163mm by 140mm is enhanced by its internal power supply this efficiency is