How It Works: UGREEN USB to RS232 DB9 serial adapter is designed for connecting to serial devices such as DB9-equipped serial modems, ISDN Terminal Adapters, digital cameras, label writers, palm PCs, bar-code scanners, PDA, etc through a USB port with 

1Mbps data transfer rate

Plug and Play: Drive free for Windows 11/10/8.1/8, driver installation required for Windows 7/XP, Linux, and Mac OS

Connectors: With standard USB Type A male to standard 9-pin DB9 RS-232 serial connector

Conductor and Shielding: Tinned copper conductor(wire guage#24#28) and triple shielding ensure the best data transfer rate. Powered by a USB port, no external power adapter is required. Simple installation, plug & play after one-time driver installation