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



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Two Wire doorbell systems
If you have a (2) wire doorbell system and cannot locate your transformer,  kindly contact us to make sure the Tommyknocker can be connected.

 Lighted Doorbell  switches
The Tommyknocker is currently not designed to work with a lighted doorbell switch.  We are working on a Mod that fixes this problem. In the mean time the Tommyknocker must be connected to an un-lighted switch.

Wiring Diagram 6 Wire
Wiring Diagram 7 Wire
Tommyknocker User Guide

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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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