The PC serial port has gone the way of the dodo, replaced by the popular and flexible USB port. However, there are still many devices that require a serial connection, be they older legacy devices or newer applications, such as interfacing with automotive computer systems or computer control of audio/video equipment. This USB to RS232 Serial Converter cable from Monoprice is what you need to connect your PC with that serial device.This cable features a USB make connector on one end and a 9-pin serial (DB9/DE9) connector on the other. A 9-pin to 25-pin adapter is included for use with older 25-pin serial connections.Features * Length 70-inch* Connectors One USB-A to DB9 Male(BT-DB9)* Connectors One USB-A to DB9 Male and DB25 (BT-DB925)* Supports automatic handshake mode* Over 1Mbps data transfer rate* Supports remote wake-up and power management* 96 byte buffer each for upstream and downstream data flow* Easy installation* Works with cellular phones, PDA, digital cameras, modems, and ISDN terminal adapters* Frees your RS-232 ports for other uses* No IRQs, no IRQ conflicts* Requires Microsoft Windows 98, Me, NT, 2000, XP, Vista, Windows 7 (32 and 64)*** 30-day easy returns. No restocking fee. Free lifetime technical support. 1 year warranty. ***