USB to RS232 Serial Printer Cable 1M - Add an RS-232 DB9 Port to PC,Mac through USB.
Serial DB9 to USB Adapter - allows PC Mac to connect serial devices and programs through COM ports.
USB Serial Cable - with standard USB Type A Male to standard 9-pin DB9 RS-232 serial connector for Windows 10 / Mac OS X LT Capitan / Linux / Android
Designed for - Serial devices such as DB9 equipped PC, Cisco Routers, GPS,Label Writers, Serial Modems, Digital Cameras,Telescope, Palm PCs for updating firmware.
LED lights for PWR and TX and RX activity - Being able to actually see when data is transmitted through the adapter is a big advantage when troubleshooting.