You can now connect either a 9-pin or a 25-pin RS232 serial device to your laptop or desktop computer through a USB port using the StarTech 3-feet USB to RS232 DB9/DB25 Serial Adapter Cable. It does not require any additional cables so you can simply plug and play. This USB power adapter cable enables you to connect and remove the device without the need to reboot your computer. The StarTech 3 USB to RS232 DB9/DB25 Serial Adapter Cable is a cost-effective solution that bridges the compatibility gap between modern computers and serial peripherals. This cable is USB 2.0 compliant.