Printing method: dot matrix impact printing printing speed: up to 5.1 lines per second printing resolution: 80 dots per inch (dpi) paper width: 76 mm (standard), 69.5 mm (min) - 182 mm (max) paper thickness: 0.06 - 0.085 mm characters per line: font a: 35, font b: 40, font c: 42 character set: alphanumeric, international, code pages interface options: parallel, serial, usb, ethernet auto cutter: partial cut (srp-275ii) or tear bar (srp-275iia) emulation: esc/pos, opos reliability: mean cycles between failure (mcbf) of 18 million lines power supply: external power adapter