Quality Cables, Leads and AdaptersFast UK Despatch \u00B7 2.5M+ Positive FeedbackNewlink Quad USB 2.0 Serial RS232 Adapter 4 PortThe USB to Serial RS-232 Cable provides 2 or 4 (depending on model bought) RS-232 Serial (DB-9 male) connectors via one standard USB port. You can instantly enjoy connectivity with your Modem PDA POS or other serial devices on your PC or Mac without the hassle of opening your computer case. It provides a quick simple and cost-effective solution and is ideal for various communication and automation applications. \n Compatible with USB Specification v1.1 and v2.0 (Full-Speed) Supports 2/4 port Serial ports at the same time Supports all common RS-232 Serial Port Automatic USB Protocol handling Supports remote wake-up and power management USB bus powered no external power supply required\n Requirements \n Available USB port Windows 2000 Windows XP Windows Vista Windows 7 Mac 10.4/5 \nSpecificationsBrandkenableTypeUSBConnector AUSB Standard Type A MaleConnector.