Newhouse Hardware CHM3D Door Chime
- Dimensions: Cover: 8. 25” L X 5. 5” W Base: 6. 63” L X 4. 75” W
- Compatibility: Use with a 16-volt/10 VA or 16-volt/30 VA transformer (not included) when connecting to a regular doorbell. Search “16TR”, "30TR" or "3TRAN" for a compatible transformer). NOT compatible with digital smart doorbell systems (e.g., Ring, Nest).
- Please Note: If the chime is not working properly, the issue may or may not be with the chime. The issue could be with the doorbell button, transformer or the wiring. There are troubleshooting steps in the manual as well as on our website.
- Quality: Doorbell chime maintains a textured white modern finish. Easy to install to your doorbell button and doorbell transformer. Backed by a 2-year limited warranty.
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A solid replacement for an old two-note wired chime.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B07KG81WY2Model: CHM3DCategory: Doorbell Chimes
Overview
Newhouse's CHM3D is a two-sound wired door chime in white, pairing a classic ding-dong for the front button with a separate dong for a back or side door. It needs its own 16V transformer and is built for standard wired doorbell circuits, not digital smart-doorbell kits.
The seller's own bullet points still flag it as not built for digital smart doorbell systems such as Ring or Nest, so the safe read is that it suits wired hardware needing extra power, not a battery or app-only chime. A handful of buyers heard an electrical buzz alongside the ding-dong, most often tied to a mismatched transformer voltage rather than a wiring mistake.
- Two-note ding-dong front, single dong for a second door
- Cover 8.25 x 5.5 in, base 6.63 x 4.75 in
- Needs 16V/10VA or 16V/30VA transformer (16TR, 30TR, 3TRAN)
- 2-year limited warranty
Who it's for
Homeowners replacing an aging two-tone wired chime, including those upgrading the transformer to run a Ring Wired Doorbell Pro or a similar wired smart doorbell that draws more power. Not for anyone with a fully wireless or app-paired doorbell that skips a physical chime box.
Pros and cons
- Straightforward swap for old mechanical chimes like the NuTone LB12
- Two-year limited warranty
- A few buyers heard an electrical buzz, usually tied to transformer mismatch
- Seller lists it as not built for digital smart doorbell systems
- Needs its own 16V transformer, not included
Performance notes
Two coils behind the white cover strike on their own circuits: the front button rings both for the ding-dong, and a separate rear or side connection rings the second coil alone for a single dong, powered through a 16V/10VA or 16V/30VA transformer.
Specifications
| Brand | Newhouse Hardware |
|---|---|
| Model | CHM3D |
| Dimensions | Cover: 8. 25” L X 5. 5” W Base: 6. 63” L X 4. 75” W |
| Compatibility | Use with a 16-volt/10 VA or 16-volt/30 VA transformer (not included) when connecting to a regular doorbell. Search “16TR”, "30TR" or "3TRAN" for a compatible transformer). NOT compatible with digital smart doorbell systems (e.g., Ring, Nest). |
| Please Note | If the chime is not working properly, the issue may or may not be with the chime. The issue could be with the doorbell button, transformer or the wiring. There are troubleshooting steps in the manual as well as on our website. |
| Quality | Doorbell chime maintains a textured white modern finish. Easy to install to your doorbell button and doorbell transformer. Backed by a 2-year limited warranty. |
| Two Sounds | Classic two-note “Ding Dong” sound for the front door button and has an additional connection with a separate "Dong" for the rear or side door. |
Frequently asked questions
Is the CHM3D compatible with the Ubiquiti G4 Doorbell Pro?
Yes, a reviewer confirms it is listed by Ubiquiti as a compatible chime for the G4 Doorbell Pro.