SET THE TONE With The Only Truly Digital MP3 Doorbell...

The Tommyknocker is a USB, all digital doorbell. MP3 sound files may be uploaded to the Tommyknocker USB memory stick via a computer.

 Quick Links  
Download Free "Rare Music Tracks from Stonecold" 
Download Tommyknocker User Guide

Wiring Diagram 6 Wire
Wiring Diagram 7 Wire

FAQ - Two Wire doorbell systems &  Lighted Doorbell switches

About Us


Predominance LLC was formed in 2009 as a holding company for technologies developed over the years for use in both residential and commercial markets.

We will continue make products designed for durability and sonic transparency and will not cheapen the concept for sake of intemperate profiteering.

We understand and respect personal space and will carefully manage our product exposure in and on commercial media.

Every effort will be made to assure that this company returns something constructive to the world that patronizes it, whether that is directly through financial support to individuals, groups or meaningful endeavors that actually support worthy, non political causes.

We will promote jobs and vending sources in the USA first and offer real living wages and opportunities.
We will strive to minimize environmental impact and fully endorse a sustainable and healthy planet first and always.

 

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About Us

Predominance, LLC was formed in 2009 as a holding company for technologies developed over the years for use in both residential and commercial markets. More..


Contact Us

Phone: 973-886-7560
Predominance, LLC
Sparta, NJ 07871


E-mail: sales@tommyknockerdoorbell.com
E-mail: Support

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