MCM Electronics

12VDC Programmable BuzzerMCM Part #: 50-2992  |  Projects Unlimited Part #: API-4260-LW150-R

12VDC Programmable Buzzer 4.1 stars from 5 reviews.
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Programmable Indicator

This device connects to any 12VDC source in the same manner as commonly available buzzers and piezo sounders, yet allows you to program up to 30 seconds of any WAV or MP3 file via USB from your computer. With the flexibility of programming your own sounds, you are no longer required to listen to the standard tones, beeps, buzzes or alarm signals. The programmable indicator allows you to give voice instructions along with a warning signal or a unique tone if multiple warning devices are used in the same area.

Product Description

Wide frequency capability allows this indicator to play a variety of tones, alarm signals, or voice and music messages. Once programmed, the indicator will play the file repetitively until power is turned off. The file is stored on internal non-volatile flash memory that can be reprogrammed as often as you like and will not erase until another file is programmed over it. While rated for 12VDC, the actual operating range is 7~24VDC, enabling compatibility with a variety of power sources, including AC adapters, automobile systems, security system power supplies, or a simple 9V battery.

Note: This device requires a Software Download from the manufacturer.


  • Ability to program any WAV or MP3 file
  • Volume can be controlled by file programming
  • Flash memory can be programmed more than once
  • Pre-programming available on certain quantities
  • Repeating continuous operation
  • Simple-to-use Windows interface
  • Wide frequency range
  • DC operating voltage
  • Flange mounting


  • Rated Voltage: 12VDC
  • Voltage Range: 7 ~ 24VDC
  • Frequency Range: 100Hz ~ 6KHz
  • Minimum SPL (10cm w/default 1KHz tone): 100dBA
  • Max Rated Current: 350mA
  • Max File Length: 33 seconds
  • Sampling Rate: 12KHz

Note: USB mini 5-pin cable required, not included

Product Reviews

  • "Good little device" by cerdelyi on 4/10/2014
    Overall: 4.5 out of 5

    Have them all over town programmed with a door bell sound. Use them in convenience store back rooms and coolers to let the clerk know that someone just entered the store. A little pricey but I haven't found anything else that will do what this will.

  • "Nice for adding a custom sound or announcement to your projects" by ronbest on 7/30/2013
    Overall: 5 out of 5

    Have used them as Dr. Nurse call, Driveway alert, door chime for exit/entry, museum displays, etc.

  • "No documentation supplied at all" by Larepair on 12/10/2012
    Overall: 3 out of 5

    Although there is now a "Manual" PDF link now for this product, the manual still doesn't reveal what PR Malloy provided in his review, that software must be downloaded and installed before this product can be used. MCM should put a link to the software website prominently in the product description. Plugging it in without the software will yield "device found and ready to use" on your PC, but that's it. You won't see it listed anywhere as a drive or device. You must connect the USB cable, and then Run the software, before you can access the device to program it. The product description mentions volume of your chosen audio file "can be controlled by file programming". What that really means is that it is up to YOU to provide an audio file with sufficient volume BEFORE you upload it. The device has no volume control, nor does the downloaded utility used to program your file into the device. All the software will do is allow you to overwrite the current file in use with a new file. It doesn't access an existing file, or allow any changes to be made to it.

  • "Need software to use." by PR Malloy on 10/9/2012
    Overall: 4 out of 5

    In order to use this device, you need to download software from: Nowhere does anything say that. Other than that little glitch, it works great.

  • "Programmable Buzzer" by msorokach on 10/26/2011
    Overall: 4 out of 5

    works excellent will be buying more just wish the price would be lower

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Package Specifications & Dimensions
Weight:0.07 lbs.
RoHS Comp:Yes
Warranty:90 days
Need to Return?
Length:2 in.
Width:2 in.
Height:1.25 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No
Catalog Pages

MCM Cat 57, Page 703

MCM Cat 56, Page 633

PDF Reference

Requires Adobe Acrobat Reader.

Mfr. Info

Projects Unlimited Logo
Mfr. Name:Projects Unlimited
Mfr. Part Number:API-4260-LW150-R
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