Citizen CT-S4000 4-Inch USB Serial Thermal POS Printer

Print receipts, tickets, and other wide-format transaction documents on 4-inch thermal media with a desktop POS printer built for counter-facing workflows. Thermal printing removes the need for ink or toner, while 203 dpi resolution supports legible text, barcodes, and receipt graphics. The CT-S4000 platform provides the wider media path needed where a standard 3-inch receipt printer is too narrow. USB and serial interfaces allow the printer to connect with POS terminals, embedded systems, and legacy host hardware that still depends on serial communications. This interface combination is useful when replacing an installed receipt printer without changing the host connection method. Black housing suits counters and work areas where a dark peripheral finish is preferred. Citizen CT-S4000RSU-BK is the USB-and-serial black configuration in the CT-S4000 thermal POS printer range. Its 150 mm per second print speed supports active checkout and service stations, while the 4-inch format accommodates wider receipts and tickets than common narrow-roll POS printers. Select this configuration when the deployment requires both wide thermal output and direct USB or serial host connectivity.