... cash drawer ,customer display together 2.connected to your pos software 3.HD LCD displays 1024*768 Function1. Perfect ... display 8 characters)I/O PORTparallel/LPT/Printer port1pcsserial port4pcsUSB port6pcsCash Drawer portConnected to the pos machine with the printer ... printerOS support(didn't include the software)windowsXP Pro, XP Embedded, WEPOS, POSReady 2009, Win 7linuxFedora, SUSEAPPROVAL CE, ROHS, ...