CT-S801 Thermal Printer (Serial Interface, 300mm with PNE Sensor) - Color: Black The first in a new line of revolutionary Intelligent printers, featuring the industry's first POS printer with a back lit graphic LCD display that communicates with you. It is ideal for a variety of applications from retailers, end users, resellers and software developers in any location or environment, the unit has increased functionality that opens doors to the universe. Out of Paper? The two-line LCD display alerts you: Paper end Please change paper. Alternatively, if the front cover is open F cover open Please close front cover. There is an apps provided to customize, change or edit the display message on LCD.