MODEL- ICUSB232-4 VENDOR- STARTECH.COM LTD FEATURES- 4 Port USB to RS-232 Serial DB9 Adapter Got more serial peripherals than you do ports" Do not sweat it, StarTech.com has the solution to your problem with the ICUSB232_4. It equips your system with four RS-232 serial ports while taking up only one USB port! Connecting devices like serial modems, GPS receivers, serial printer