- Add A 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 - Rugged Tpe Housing And Level-4 Esd Protection; Copper Shielding; Gold Plated Connectors; Operating Temp. -40 C To 80 C - Transmit/Receive Led Indicators For Port Activity; Usb Led For When The Adapter Has Successfully Enumerated On The Desktop - Works W/Windows/Macos/Linux; Max Baud 115.2Kbps; 128 Byte Rx And 256 Byte Tx Fifo; Ftdi Ft232R Chipset