... Handheld and countertopMultiple Modes of CommunicationMultiple modes supported, such as Modem, GPRS, Ethernet3 serial ports &, 2 USB ports for external device connection ... backlit keypad, 4 function keys;CommunicationGPRS 850/900/1800/1900MHz, Modem, Ethernet, WIFISDKC languageOSLinuxPrinterthermal, 18 lines per second, paper roll 58mm x ...