This product is either discontinued or we cannot get that from suppliers.
Device Connections: 4, USB Port: 1 x USB Type B Female (White), Power: 1 x DC Jack, Serial: 4 x DB-9 Male (Black), Ports: 4 (Green), Power: 1 (Orange), Data Rate: 115.2 Kbps (max.), USB Specification: USB 1.1 Compliant; USB 2.0 Compatible.
The ATEN USB-to-Serial RS-422/485 Hub provides an external plug-and-play RS-422 / RS-485 serial connection for computers, notebooks, laptops, and handheld computing devices that support the USB specification.