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StarTech.com 2 Port 54mm ExpressCard RS232 Serial Adapter Card with 16550 UART EC2S55254

High-performance single-chip design optimizes speed reliability and power while reducing CPU load by as much as 48 over conventional bridge chip adapters
Full width 54mm ExpressCard is the perfect fit for business laptops ensuring a long life without damaging the card or your computer
The included breakout cable spreadsspaces out the 2 serial ports to avoid crowded peripheral connections
Two 16C450550 compatible UART serial ports
Supports baud rates up to 128000bps
256 Byte deep transmitreceive FIFO