The CL-S521II offers a reliable, easily integrated industrial desktop printing solution. These units are supplied as standard with on-board ZPL® and Datamax® emulations plus BASIC Interpreter programming support, offering maximum flexibility and easy compatibility with other applications. Model No: CL-S521 II Width of Paper: 4 Inch/104mm Printing Method: Thermal Transfer Printing Speed: 150mm/s Interface: Serial (RS-232C), USB, LAN, Ethernet,Parallel are optional