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


Privacy Policy

What information do we collect?

We collect information from you when you register on our site or place an order.

When ordering or registering on our site, as appropriate, you may be asked to enter your: name, e-mail address, mailing address, phone number or credit card information. You may, however, visit our site anonymously.

What do we use your information for?

Any of the information we collect from you may be used in one of the following ways:

To personalize your experience
(your information helps us to better respond to your individual needs)

To improve customer service
(your information helps us to more effectively respond to your customer service requests and support needs)

To process transactions
Your information, whether public or private, will not be sold, exchanged, transferred, or given to any other company for any reason whatsoever, without your consent, other than for the express purpose of delivering the purchased product or service requested.

To send periodic emails
The email address you provide for order processing, will only be used to send you information and updates pertaining to your order.

How do we protect your information?

We implement a variety of security measures to maintain the safety of your personal information when you place an order or enter, submit, or access your personal information.

We offer the use of a secure server. All supplied sensitive/credit information is transmitted via Secure Socket Layer (SSL) technology and then encrypted into our Payment gateway providers database only to be accessible by those authorized with special access rights to such systems, and are required to ? keep the information confidential.

After a transaction, your private information (credit cards, social security numbers, financials, etc.) will not be stored on our servers.

Do we use cookies?

Yes (Cookies are small files that a site or its service provider transfers to your computers hard drive through your Web browser (if you allow) that enables the sites or service providers systems to recognize your browser and capture and remember certain information

We use cookies to help us remember and process the items in your shopping cart.

Do we disclose any information to outside parties?

We do not sell, trade, or otherwise transfer to outside parties your personally identifiable information. This does not include trusted third parties who assist us in operating our website, conducting our business, or servicing you, so long as those parties agree to keep this information confidential. We may also release your information when we believe release is appropriate to comply with the law, enforce our site policies, or protect ours or others rights, property, or safety. However, non-personally identifiable visitor information may be provided to other parties for marketing, advertising, or other uses.

Children's Online Privacy Protection Act Compliance

We are in compliance with the requirements of COPPA (Children's Online Privacy Protection Act), our policy is located at

Terms and Conditions

Please also visit our Terms and Conditions section establishing the use, disclaimers, and limitations of liability governing the use of our website at

Your Consent

By using our site, you consent to our online privacy policy.

Changes to our Privacy Policy

If we decide to change our privacy policy, we will post those changes on this page.

This policy was last modified on 6/14/2011

Contacting Us

If there are any questions regarding this privacy policy you may contact us using the information below.
270 Sparta Ave. Suite 104
Sparta , New Jersey 07871

Terms and Conditions


All content appearing on this Web site is the property of:

The Tommyknocker Digital Doorbell
Predominance, LLC
270 Sparta Ave Suite 104
Sparta, NJ 07871

Copyright © 2011 The Tommyknocker Digital Doorbell. All rights reserved. As a user, you are authorized only to view, copy, print, and distribute documents on this Web site so long as (1) the document is used for informational purposes only, and (2) any copy of the document (or portion thereof) includes the following copyright notice: Copyright © 2011 The Tommyknocker Digital Doorbell. All rights reserved.

Use Of Site

This site may contain other proprietary notices and copyright information, the terms of which must be observed and followed. Information on this site may contain technical inaccuracies or typographical errors. Information, including product pricing and availability, may be changed or updated without notice. The Tommyknocker Digital Doorbell and its subsidiaries reserve the right to refuse service, terminate accounts, and/or cancel orders in its discretion, including, without limitation, if The Tommyknocker Digital Doorbell believes that customer conduct violates applicable law or is harmful to the interests of The Tommyknocker Digital Doorbell and its subsidiaries.

Shipping Policy

At this time, The Tommyknocker Digital Doorbell ships merchandise to locations within the United States and U.S. territories, including Alaska, Hawaii, Puerto Rico, Guam, and the US Virgin Islands. Additionally, The Tommyknocker Digital Doorbell ships merchandise to Canada and Mexico, but not to other international locations. The risk of loss and title for all merchandise ordered on this Web site pass to you when the merchandise is delivered to the shipping carrier.

30-Day Money- Back Guarantee

We want you to be fully satisfied with your new Tommyknocker Digital Doorbell. If you are not satisfied with the item that you have purchased, you may return the item within 30 days of delivery for a full refund of the purchase price, minus the shipping.

The item must be returned in good condition, in original boxes, and with all paperwork, parts and accessories to ensure full credit. Please see our Return Instruction and Return Policy before returning your item,

Return Policy

We strive to make every Predominance product with the highest quality and to assure that each item arrives in working order.  If you are missing a piece or have had difficulty in installing or using your device, we hope that you have tried to contact our customer support before deciding to return your device.  If , however, you do need to return the device, please follow the “ Return Instructions”.

Predominance will not accept any return without a return authorization number.  To receive credit for you device, you must properly package the device and all accessories. The unit must be received in good condition. You are responsible to ensure that the unit is packaged properly for safe return.  Units received damaged from inbound shipment will not receive full credit.

Upon the safe return of a complete unit, Predominance will issue a credit to your account within 30 days.  Should any adjustments be made for damaged or missing components, Predominance will supply you with an explanation of any charges and credits issued via your email address.

We cannot stress the importance of proper packaging.  We want to stand by our satisfaction promise to you but we cannot give full credit for devices damaged due to improper shipment packaging, or items returned incomplete.  Please do take care to follow prudent packing techniques when returning your device.

Return Instructions:

Please email us at to get a return authorization number and follow the instructions in the return email.  Credit will not be issued unless you have obtained and mark your return package with the return authorization number.

Here are the basic steps:

Place the item securely in the original package. If you don’t have the original packaging material we suggest that you take the device to a nearby shipping/packaging center such as The UPS Store,  Federal Express Office and Print Center, Pack & Ship or similar packaging service store.   If you do not have access to a shipping center, be sure to use a sturdy box and  bubble wrap or anti-static Styrofoam peanuts ( usually pink ). Make sure the item is secure in the box and that the volume adjustment is sufficiently protected against the edge of the box.  Don’t forget to enclose memory stick, mounting plate, pigtail cable and manual. Remember !!  units improperly packaged and damaged will not receive full credit.!!

Enclose your contact information including name; address, phone and return authorization number on a separate piece of paper inside the box.  Also mark the outside of the box or shipping document with the return authorization number.

All products must be returned in good condition, with paperwork, parts and all accessories to ensure a full credit.

Ship or mail your package to: Predominance, LLC   29 Tracey Lane Sparta,   New Jersey 07871.

Note: Do not ship collect.  Be sure that shipping charges are properly paid.  Predominance will not accept collect shipments



Document Library


Music Library


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
270 Sparta Ave Suite 104
Sparta, NJ 07871

E-mail: Support


Privacy - Shipping - Terms