StarTech ICUSB232_4 4 Port USB to RS-232 Serial DB9 Adapter Changer Type: USB to DB9 (RS-232) Specifications: Warranty: Lifetime warranty Connector Types: 1 - USB A Male Connector Types: 4 - DB9 Male Maximum Data Transfer Rate: [115 Kbits/Sec] Industry Standards: RS232 Industry Standards: USB 1.1 System Requirements: One free USB port OS Support: Windows 98SE/ME/2000/XP and Server 2003 Communication Buffer: Dual 16 Byte hardware data buffer design buffers upstream and downstream data flow Cable Length: 6 feet (1.82 meters) Product Weight(include package): 0.73 lbs.