New Open Box Dot Matrix Printer. This printer is new, but the box has been opened. The Panasonic KXP-3123 printer is a narrow-carriage, 24-pin impact printer that prints at a speed of 240 cps with a dramatically lower noise level than most other dot matrix printers. The 11.7" carriage width of the KX-P3123 enables landscape orientation of 8.5 x 11 paper. The printer's rear, bottom & top feeds provide a wide choice of paper paths.