Compatible UHCI / OHCI / EHCI host controller; FT230X USB TTL null modem cable; TTL 3.3 v converter on both sides. We make TX to connect RX, Rx to connect TX for receiving/sending datas to each other. TX-RX, RX-TX, CTS-RTS, RTS-CTS, GND-GND. Typical Applications PC to PC networking using USB port. File transfer between PCs. Password protected file transfer between PCs.