SerialGear Industrial 8-Port DB-9 RS232 to USB Adapter High-Speed FTDI Chip 921.6Kbps Adds eight ports with 921.6Kbps with FTDI Chipset. Chassis constructed of High-Grade metal with mounting flanges. Provides a scalable interface with the ability to add multiple modules. Supports 3-wire RS-232 signals (TxD, RxD, GND). 512-Byte Deep FIFOs for each Port