The EC1S232U2 ExpressCard RS232 Serial Adaptor Card (USB-based) (16950 UART) adds an RS232 (DB9) serial port to your ExpressCard-equipped laptop, enabling you to connect an RS232 serial peripheral device such as a plotter, digital signage device, receipt printer or bar code scanner through an available ExpressCard slot. This USB-based ExpressCard supports RS232 serial data transfer rates up to 460 Kbps and eliminates the need to upgrade serial peripherals to more modern interfaces (e.g. USB, etc.) for the sake of host compatibility, saving both expense and hassle. Backed by a StarTech.com Lifetime warranty and free lifetime technical support. Saves the expense of having to replace older serial devices for the sake of being able to connect to newer laptops, which typically aren't equipped with serial ports. USB-based ExpressCard offers a fully Plug & Play and Hot Plug compatible interface, for simple installation and removal of your peripherals. Supports data transfer rates of up to 460 Kbps, for optimal serial device performance. Adding RS232 serial devices (e.g. POS devices, PDAs, printers, ISDN terminal adapters, etc.) to a laptop computer that lacks a built-on serial port.