FEATURES- USB 4-port Serial Adapter
       Our USB 4-Port Serial Adapter allows 4 serial devices to be 
        connected to a single USB port. It provides a simple way to add 
        serial ports to a PC without the hassle of installing a serial 
        card, turning off the PC, or configuring IRQs. 
       This adapter is ideal for industrial and enterprise markets where 
        there is a need to connect serial device to a PC for process 
        control, data collection, or point of sale applications. It is also 
        ideal for connecting modems, fax modems, or terminals to a server. 
       For use with all RS-232 serial devices including modems, GPS 
        devices, cell phones, hand held scanners, networking equipment 
        (console port), graphics tablets, point of sale devices, touch 
        screens, UPS devices, medical and scientific instruments, 
        industrial process control devices, building automation 
        instrumentation and other serial devices.
    Includes Adapter (USA-49WG), 6 ft. USB device cable, CD with driver 
      software and user guide.
* Certified: Microsoft WHQL approved 
* High Speed: Supports 460 Kbps - four times the speed of a built in serial 
  port.
* Detachable Cable: Use adapter with any USB cable (up to 5 meters long) 
* LEDs: Show adapter status and data activity 
* Plug & Play: Appear as standard COM ports 
* Bus Powered: No external power adapter required 
* Analytic Tools: Includes Windows line monitor and data trace software 
* Field Upgrade: Easy to update over time with free software downloads 
* Easy Expansion: Supports use of multiple adapters on one PC 
    
  -- SPECIFICATIONs -----------------------------------
CONNECTORS   - (1) USB 2.0 port
               (4) RS-232/DB9 male ports
REQUIREMENTS - Windows  : An available USB port
                          Windows 98/Me/2000/XP
               Macintosh: An available USB port
                          Mac OS 8.6 or greater
                          Mac OS X (10.2.8, 10.3.9, 10.4 or greater)

Keyspan by Tripplite. It's easy to connect four RS-232 serial devices to a USB port. Designed for enterprise and industrial applications including point of sale, data acquisition, and process control system. For use with a Mac, or Windows PC or woth 2002 Pocket PC's with USB host capability. RoHS compliant replacement for USA49WLC