USB,SERIAL INTERFACE.Paper near end sensor Receipt printed alert and error alarm function Support network status monitoring and PC,Multi-link printing,OPOS driver Printer identification and software bundle High speed driver mode printing Various international language and GB18030 character Support Parallel, Serial, USB and Ethernet port Built-in 128K bytes data buffer Support cash drawer connecting Built-in interface provides control capability for cash drawer. Command protocol is based on ESC/POS & STAR command sets Various Layouts are possible by using page mode Characters can be scaled up to 64 times as large as standard size. Repeated operation and copy printing are possible. Character font size (1224/917/24*24 font) optional. Easy paper-roll installation. Easy paper jams clearance. Easy maintenance for tasks such as head cleaning