With 64 MB of flash memory and 16 MB of standard RAM, the Intermec PB51B33004100 is a battery-powered portable direct thermal printer built around a 2200 mAh Lithium Ion cell. It prints monochrome receipts, labels and tags at 203 dpi and up to 4 in/s across a maximum print width of 4.39 inches, handling media on rolls up to 2.65 inches in diameter with a 0.75-inch core. Reflective, out-of-paper and media door open sensors reduce lost transactions, and an LCD display simplifies operation in the field. Serial, USB and Bluetooth connectivity are standard, with ESC/P language emulation. The unit measures 6.9 in tall by 6.3 in wide by 3.1 in deep and weighs 2.62 lb, suited to field service, route accounting and mobile point-of-sale use. A one-year limited warranty is included.