Estone USB to RS485 485 Converter Adapter Support Win7 XP Vista Linux Mac OS WinCE5.0 Only sold by Heroneo.Photo taken by Heroneo. 100% Brand new and high quality No need external power, powered by USB port Fully compliant USB 2.0 standard , backward compatible with USB1.1 Support System: Windows XP , Vista, Windows 7 , Linux , MacOS , and WinCE5.0 drive All kinds with RS485 port device parameter settings , data communication