Reliable Reader/Writer Handles Magnetic Cards, center track read/write capability, compact size and light weight ease installation in any terminal, user-selectable bit recording densities of 75 bpi, 105 bpi, 150 bpi, and 210 bpi, HiCo write capability available and adjustable to card thicknesses of 0.20 mm, 0.40 mm, or 0.76 mm (PET, paper, or PVC cards). RS-232C.