- Add A Null Modem Db9 Rs-232 Serial Port To A Desktop/Laptop Using A Usb-A Port - Db9 Nuts Pre-Installed; Db9 Screws Included For Device/Cable Compatibility - Resolve Dce/Dte Conflicts Without Cross-Wired Cables/Adapters; Rugged Tpe Construction; Level-4 Esd Protection; Copper Shielding; Operating Temp -40C To 80C - Transmit/Receive Led Indicators; Usb Led Shows Successful Enumeration - Windows/Macos/Linux; 1Ft/30Cm Cable; Max Baud 115.2Kbps; 128 Byte Rx; 256 Byte Tx Fifo; Ftdi Ft232R Chipset