Slots: 4 x serial (DB9 / COM) female

Interface: PCI express 1x

Chipset: Asix/MCS9900

Supports functions: RS232, RS485, and RS422

Bidirectional transmission speed: 16-50 Mbps/Port

Bitrate control support: hardware and software

Operating modes: 5, 6, 7, 8, and 9 bit

Parity: Even, Odd, None, Mark, Space

Slow mode support: IrDA

Included piece: low profile (4 pieces)

Dimensions: 65.3 x 58.2 x 16 mm

External ports: 4x DB-9 (RS-232) serial port