Add a DB9 RS-232 serial port to a desktop / laptop using a USB-A port - DB9 screws pre-installed; DB9 Nuts 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.