Rongta RPP300 Portable Mini 80mm Pocket Mobile POS Thermal Receipt Printer with Bluetooth+USB interfaces,Gray Color Portable,battery-operated receipt printer can be used wireless with a mobile device(sold separately) to printer receipts,labels,or other media up to 3" wide Direct thermal printers use heat instead of ink and are typically smaller,quieter,faster,and more energy-efficient than dot-matrix printers Prints up to 2.94" per second at 203 dpi(dots per inch) for print clarity Wireless Bluetooth capability lets printer connect wirelessly to an Android smartphone for printing or support windows system printing Weighs 600g;measures 113x103x45 mm/4.45x4.06x1.77 inches(LxWxH);NOT COMPATIBLE WITH SQUARE OR CLOVER