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
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..
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