Model Number: E31 panel printer-TTL Brand Name: WH,Brightek Key Specifications/Special Features: Please refer to the table below ItemsSpecificationsPrinting methodDirect thermal line printing Paper width 57mm Print width 48mm Resolution ratio 8 dots/mm(384 dots/line ) Life of print head 6x10 character lines Printing speed 60mm/sec(when the utilization rate is 25％) character size 6x8dots,8x16dots,or 12x24dots Chinese character library GB2312,16X16dots, 24x24dots Paper supplied Thermal roll paper(57mm wide, ￠30mm) Interface Serial RS232/TTL/485/Parallel interface Input Power DC 5-8.5V, 15W/DC 9-24V, 30W Operating temperature 5 - 50°C Storage temperature -20 - 60°C Operating humidity 10 - 80% Storage humidity 10 - 90%