Specification Full compliance with the USB Specification V2.0 Data Transfer Rate : 1.2/12/480 Mbps of USB. Parallel port (DB 25 Female) support IEEE-1284 compliant parallel printers. Serial ports (DB 9 Male) support up to 115kb/sec serial devices. Plug and Play. USB to Parallel is Bi-directional. Supports Windows 98/98SE/ME/2000/XP Add one high-speed serial port, one printer port, and 2 downstream USB ports to your PC or notebook in seconds. Improve the inconvenience of configuring old PC solutions like card extension solutions, which require to adjust IRQ or jumper settings and the incompatibility of various brands of docking solution or bus repeater. Avoid the hassle of removing your PC case, or rebooting the operating system during installation. Port Replicator : 1USB2.0 upstream port / Type B receptacle. 2 USB2.0 downstream port, Type A receptacle 1 serial port, DB 9 Male, 1 parallel port, DB25 Female LED : 1 x Yellow (Working Indicate) USB2.0 cable length : 1.8M Housing : Plastic Weight : 65 g Dimensions :70*60*24 mm (L ,W , H) System Requirements : A PC with a minimum of a 75MHz Pentium, or equivalent A minimum of 16M bytes of RAM. One available USB type A downstream port. ( either UHCI or OHCI ) * Windows 98/98SE/ME/2000/XP