Features: Four RS-232 male DB9 ports are provided for direct connection to serial devices. Support a variety of serial device modems, PDAs, mobile phones, digital cameras, card readers, etc. The data transfer rate is as high as 921.6KB / s. It is applied to POS systems, automatic ticketing systems, financial-to-public savings systems, railway real-time station reporting systems, and other serial device control systems. Support for Windows 95 / 98 / 98SE / Me / 2000 / XP / vista / Win7 / 8 / win10 / Linux OS / DOS. Compliant with 16C950 and backward compatible. Easy to install plug and play. No external power supply is required. Support for industrial PCs. Four-layer PCB design. Support for USB 2.0. The serial port number is adjustable. A high speed I/O controller is used. Built-in SPP, PS2, EPP, ECP. Specifications: Material: ABS Color: Black Package List: 1* Serial Port Adapter 1* CD 1* Instruction manual 1* USB cable 1、Four RS-232 male DB9 ports are provided for direct connection to serial devices. 2、Support a variety of serial device modems, PDAs, mobile phones, digital cameras, card readers, etc. 3、The data transfer rate is as high as 921.6KB / s. 4、It is applied to POS systems, automatic ticketing systems, financial-to-public savings systems, railway real-time station reporting systems, and other serial device control systems. 5、Support for Windows 95 / 98 / 98SE / Me / 2000 / XP / vista / Win7 / 8 / win10 / Linux OS / DOS.