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Keyspan High-Speed USB to RS-232 Serial Adapter



 | Catalog #: 55040368
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$3.88 (11%)
Valid until: 08/11/14
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  • Connect a USB and RS-232 port easily and get a data transfer rate of over 230Kbps
  • Supports automatic handshake mode, remote wake up and power management
  • Includes a 96-byte buffer, each for upstream and downstream data flow
  • Works with mobile phones, PDAs, digital cameras, modems and ISDN terminal adapters

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ONLINE In stock
Usually ships in 1 - 2 business days

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Product Summary

New school meets old school.

Connect your RS-232 serial devices to a Mac® or PC with an available USB port using Keyspan's High-Speed USB to RS-232 Serial Adapter.

  • Supports 230Kbps and use of multiple adapters on one PC with no external power adapter required
  • Use adapter with any USB cable up to 16-ft. long
  • Microsoft® WHQL approved
  • Plug & Play: appears as standard COM port
  • Analytic Tools: includes Windows line monitor and data-trace software

You'll also need

  • An available USB port
  • Microsoft Windows® 98, Me, 2000, XP, Vista® 32/64 bit, 7 32/64
  • Mac OS® 8.6 or greater, Mac OS X (10.2.8 or greater)
Pricing and availability: Please note that all prices are subject to change without prior notice. Prices advertised on this site are for online orders only. Prices on some items may differ from those advertised in RadioShack stores. All merchandise may not be available at all stores, and all stores may not participate in all sales promotions. We recommend you contact the store to confirm product availability and price.


Usually ships in 1 - 3 business days

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Other ways to get it

By phone: 1-800-843-7422

Manufacturer Warranty

  • Parts: 2 years
  • Labor: 2 years
Tech Specs

Customer Reviews


by PowerReviews
Keyspan High-Speed USB to RS-232 Serial Adapter

(based on 1 review)

Ratings Distribution

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  • 1 Stars



Reviewed by 1 customer

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(10 of 12 customers found this review helpful)


These really work

By dnc4U

from UK

About Me Quality Oriented

Verified Reviewer


  • Highly Compatible
  • Reliable


    Best Uses

    • CNC machines to laptops

    Comments about Keyspan High-Speed USB to RS-232 Serial Adapter:

    These keyspan USB devices really work, many cheaper (and more expensive ones too!) just dont work, they often work only one way, or just junk your serial data.


    • Primary use:
    • Business
    • Computer Platform:
    • PC

    Displaying review 1

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