Add four additional RS-232 serial ports to any computer with a free USB port * Provides serial connectivity to legacy free systems lacking RS-232 serial ports * Supports wakeup and power management modes * Bus powered, no external power adapter required * Easy Plug-and-Play installation * Fully compliant with USB 1.1 specifications and compatible with USB 2.0 * Provides you with four additional Straight-Through RS232 serial ports