Thermal Printer Printing Method Thermal Transfer Resolution 203 dpi Printer Type Desktop Max. Print Length 90” USB 2.0 Yes RS-232 (Serial) Yes Ethernet No Bluetooth No Mfi (iOS) No Max. Print Width 4.25" Max. Print Speed 178 mm/sec (7 in./sec) Wifi No USB Host No Parallel Yes Memory 4MB Flash memory 8MB SDRAM SD Card Reader Yes LCD No