USB to Serial Convert Cable ( DB9M / USB A Male) - 3FT
    Product # 3726
    USB to Serial Convert Cable ( DB9M / USB A Male) - 3FT
    Product # 3726
    In Stock This item will ship on 7/25/2016 if ordered within 1 days 9 hours 49 minutes

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    Qty: 1 $7.99
    Qty: 2-9 $7.89
    Qty: 10-19 $7.79
    Qty: 20-49 $7.69
    Qty: 50+ $7.59

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    USB to Serial Convert Cable ( DB9M / USB A Male) - 3FT

    The USB-to-Serial Converter Cable allows you to connect an RS232 serial device to your PC through the USB 2.0 port with up to 230 kbps data transfer rate. This 3 foot long cable has a DB9 male connector (serial) on one end and a USB A male connector on the other.


    • Uses the Prolific PL-2303 chipset
    • Supports automatic handshake mode
    • Works with cellular phones, PDAs, digital cameras, modems, and ISDN terminal adapters
    • Supports Windows 98/98SE/ME/2000/XP/Windows 7 (32 and 64 bit), Mac 8.6 and higher, and Linux (NOT compatible with Windows 8)
    • Supports remote wake-up and power management
    • Frees your RS-232 ports for other uses or provides an RS232 connector for PCs without a serial port


    Note that, although the packaging indicates that there is a manual included with this device, there is no manual included. We will get this discrepancy corrected as soon as possible.

    Support Files:

    150 Reviews

    82.53% of the reviewers recommend this product


    Great price works as advertised

    • egoods,
    •  Sterling Heights, MI 
    • 5/8/2016 6:13:05 AM

    Pros: Cheap
    Works as advertised

    Cons: Doesn't give me free money or fold my laundry for me.

    This was not only the lowest price USB-Serial cable I could find, but it also works flawlessly. I plugged it into my laptop, which immediately recognized it without any drivers (Windows 10). It worked great for the project I was working on.

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    Works great without the need for drivers in Windows

    • Andrew Johnson,
    •  San Diego, CA 
    • 4/15/2016 11:04:34 AM

    Pros: *Price compared to other manufacturers.
    *No drivers required when using with Windows (10, 8.1, 8, 7... not sure about older versions).
    *Seems to work without issue.

    Cons: *Comes in a blister pack that has to be cut open. Not a big deal but I'd love to see this form of packaging grow out of favor.

    I have bought a total of five of these to use for consoling into Cisco routers & switches in my home CCNA study lab. They seem to work great with Windows 8.1 and Windows 10 without the need for additional drivers. They show up as a "Prolific USB-to-Serial Comm Port" devices in Device Manager as they utilize a Prolific chipset. I have an older, non-Monoprice adapter that cost probably three times as much and uses the same chipset and has lasted me four years without issue. I have a feeling the Monoprice adapters will be just as reliable.

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    USB to Serial cable

    • Rick WInters,
    •  Kearney, MO 
    • 1/15/2016 10:37:51 AM

    Got them fast and so far so good, works as advertised

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    Wonderful Cable

    • M. B. Cross,
    •  Beaumont, TX 
    • 1/14/2016 4:55:46 PM

    Pros: A great cable at an exceptional price. Works as advertised.

    Cons: None

    This cable was instantly recognized as a Prolific Chipset using the driver from Monoprice cable 2607, (

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    Was nice while it lasted

    • Sam,
    •  Arlington, TX 
    • 11/17/2015 5:26:28 AM

    Pros: Lasted beyond the 90-day return period.
    Was useful for devices with serial consoles.

    Cons: Died 2 weeks after the 30-day return period.

    It worked great for about 3 months. Pulled it out of my bag to work on a misbehaving router and it would not work for anything. Not helpful at all.

    by Monoprice Administrator
    Hello Sam,

    Thank you for your review and my apologies for the issues you have encountered with PID 3726. Unfortunately, it sounds like you may have received a defective product. If you try plugging it into a different USB port does the same issue occur? Also, if you test it out with a different device does the issue still occur?

    Mark P.
    Tech Support Associate

    by Sam
    I've tried with different ports, and on different computers running different operating systems. It does not work.

    by Monoprice Administrator
    Sorry for the delayed response. Thank you for that information. It sounds like it is just a bad cable. There could possibly be a short in the cable. If you would like I can set up an RMA for a replacement on the defective cable. Just let me know and I can get that set up.
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