Star Micronics SM-S220i-DB40 (39630810) Direct Thermal 80 mm / sec 203 dpi 2 Inch Mobile Printer Media Type: Thermal Paper Media sizes supported: Width: 58mm Thickness: 0.06 - 0.07mm Roll Diameter: 38mm Interface: Bluetooth / Serial Dimensions: 3.15 x 5.51 x 1.97 (W x H x D) Weight: 0.55 lbs. w/ battery