36 Inch Blue USB to RS-232 Serial Cable No power supply needed, plug and play Indication LED's for Power, TX and RX FTDI Chipset Inside: FT232RL and Ultra Fast 920K ZyWyn ZT232E OS Compatibility:Windows 98, Me, XP, 2000, 2003, CE, Vista, Windows 7, and Windows 8 as well as Linux and Mac OS 10.X