The ATEN™ USB-to-Serial RS-232 Hub provides an external plug-and-play RS-232 serial connection for computers, notebooks, laptops, and handheld computing devices that support the USB specification. It provides a quick, simple, and cost-effective solution and is ideal for various communication and automation applications. Fully compliant with USB 1.1; USB 2.0 compatible. Supports automatic handshake mode. Up to 115.2 Kbps data transfer rate for each serial port.