Using the original MCS9900 new chip, good compatibility.Can simultaneously meet a parallel port device and a serial device access to use, easy to use. Compliant with PCI-Express Base Specification Revision 1.1Single-Lane (x1) PCI-Express with throughput up to 2.5GbpsSupports Serial Port number changeSupports DOS, Windows 7 / 8 / Vista / XP / 2000 / Server 2003-2008 32/64-bit, Linux Serial Port (RS232)
Compliant with industry standard 16C450 / 16C550 URAT
Chip built-in 256 bytes of FIFO and chip built-in H / W, S / W flow control function
Each cashier card data transfer rate of up to 250Kbps (custom version of the data transmission up to 1Mbps)
Baud rate: 50 bps to 250 Kbps
Serial communication parameters Data bits: 5, 6, 7, 8
Stop bit: 1, 1.5, 2
Parity: None, Even, Odd, Space, Mark
Flow control: RTS / CTS, XON / XOFF
Serial signal RS-232: TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND
Supports 5-, 6-, 7-, 8-bit serial format

Parallel Port (LPT)
Compliant with IEEE 1284 parallel port protocol
Support SPP, PS2, EPP & ECP and mode