Industrial 1 SFP & 4 Port Gigabit Ethernet Switch – Brainboxes US-346, Brainboxes US-346 4 Port RS422/485 USB to Serial Server with data transfer rates up to 921,600 baud rates and the 128 byte deep transmit and 256 byte receive FIFOS, coupled with 1Mbit line drivers deliver uncompromising performance on your laptop/PC.Drivers for Windows 32 bit and 64 bit Operating Systems including Windows XP, Server 2003, Vista, Server 2008, Windows 7 and Windows 8 with additional drivers for both Mac OS X and Linux. Brainboxes US-346 4 Port RS422/485 USB to Serial Server