The UGREEN USB to DB9 RS-232 adapter cable allows you to connect a modern computer to legacy hardware that requires a serial port. Powered by the Prolific PL2303 chipset, this one-meter grey cable converts a USB 2.0 port into a virtual COM or tty port, supporting data transfer speeds of up to 1 Mbps depending on your operating system and connected equipment. It is compatible with Windows, macOS, and Linux, provided the necessary drivers are installed. Constructed from durable PVC, the cable features double-layer shielding to protect signal integrity from interference. The DB9 male connector is equipped with thumb screws, ensuring a secure mechanical connection that won't accidentally pull loose during operation. This makes it a reliable tool for technicians and engineers who need to configure PLC controllers, network switches, routers, or manage industrial equipment like barcode scanners and label writers.