Technology : Thermal Line Printing Column capacity: 32 columns/ 16columns Print Speed: Up to 90mm/sec Print zone width : 48mm Media width (max) : 58.0±0.1mm x diameter 40.0mm Roll Width : N/A Interface : USB, RS-232, Bluetooth (optional) Flash Memory : 256KB RAM Memory : N/A Dimensions : 105 x 75 x 45mm Weight : 134g