CISCO - 2 PORT ASYNC / SYNC SERIAL INTERFACE CARD SPECIFICATIONS - PRODUCT DESCRIPTION : CISCO INTERFACE MODULE EXPANSION MODULE - 2 PORTS - DEVICE TYPE : EXPANSION MODULE - FORM FACTOR : PLUG-IN MODULE - PORTS QTY : 2 PORTS - CABLING TYPE : SERIAL - DATA TRANSFER RATE : 4 MBPS CONDITION : REFURBISHED. AVAILABILITY : IN STOCK. WARRANTY : 30 DAYS.