CableMax FTDI USB to RS-232 / RS-422 / RS-485 Pro Grade Adapter Selectable via Software Connects your DB-9 serial communication device to USB easily. All configuration and electrical interface selections are handled through the driver. Handles high data rates up to 230 kbps (RS-232) ~ 3 M Baud (RS-422 or RS-485). Incorporates up to 15Kv in ESD (electro-static discharge) protection. Maintains electrical interface settings through software - Allows computers to be upgraded without reconfiguring the device.