The Citizen CD-S501 is tabletop or wall mountable with an internal or external power supply. The CD-S501 includes built in non-volatile memory, which retains data if the power source is removed. The CD-S501 is designed to accommodate several printing applications including receipts, coupons, tickets, daily reports, kitchen slips and delivery slips. It features a logic seeking print head, is ESC/POS compatible and features a built-in buzzer. The CD-S501 also features two-color printing capability.