1 Port Serial PCI Card Works in both 3. 3 and 5. 0 volt PCI slots Standard and low profile/half-height bracket included Reach maximum transfer rates up to 420 Kbps High performance 16C950 UART channel Maximum data transfer rate of 460 Kbps PCI 2. 2 and PCI Power Management 1. 0 compliant UARTs fully compatible with 16C550 type devices 128-byte deep FIFO per transmitter and receiver