--- product_id: 138876118 title: "VIIVRIA 24V 40VA Doorbell Transformer - Heavy-Duty Copper Core for Ring Pro/2 & Nest Hello, Easy Install Hardwired Power Supply, Thermostat/Chime Compatible" brand: "viivria" price: "VT9534" currency: VUV in_stock: true reviews_count: 8 category: "Viivria" url: https://www.desertcart.vu/products/138876118-viivria-24v-40va-doorbell-transformer-heavy-duty-copper-core-ring store_origin: VU region: Vanuatu --- # 40VA max power output Easy screw & clip installation Copper core for zero voltage drop VIIVRIA 24V 40VA Doorbell Transformer - Heavy-Duty Copper Core for Ring Pro/2 & Nest Hello, Easy Install Hardwired Power Supply, Thermostat/Chime Compatible **Brand:** viivria **Price:** VT9534 **Availability:** ✅ In Stock ## Summary > ⚡ Power your smart home like a pro—no compromises, just pure performance! ## Quick Answers - **What is this?** VIIVRIA 24V 40VA Doorbell Transformer - Heavy-Duty Copper Core for Ring Pro/2 & Nest Hello, Easy Install Hardwired Power Supply, Thermostat/Chime Compatible by viivria - **How much does it cost?** VT9534 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/138876118-viivria-24v-40va-doorbell-transformer-heavy-duty-copper-core-ring) ## Best For - viivria enthusiasts ## Why This Product - Trusted viivria brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Simplicity:** Designed for quick, hassle-free installation with versatile mounting options—get your system powered up in minutes. - • **Power Up Without Limits:** Delivers a stable 24V/40VA output to keep your smart doorbells and thermostats running flawlessly—no more low voltage alerts! - • **Built to Last, Built to Perform:** Heavy-duty copper core design prevents overheating and extends your device lifespan by up to 3X. - • **Universal Smart Home Compatibility:** Certified to work seamlessly with Ring Pro/2, Nest Hello, Wyze, Eufy, Ecobee, Honeywell, Sensi, and more. - • **Power Multiple Devices Effortlessly:** Supports powering multiple thermostats and doorbells simultaneously—perfect upgrade from outdated transformers. ## Overview The VIIVRIA 24V 40VA Doorbell Transformer is a heavy-duty, copper-core power supply engineered for smart home devices requiring stable 24V AC power. Compatible with top smart doorbells and thermostats including Ring Pro/2 and Nest Hello, it ensures zero voltage drop and prevents overheating. Easy to install with versatile mounting options, it supports multiple devices simultaneously and extends device lifespan by 3X, making it the essential upgrade for modern wired doorbell and thermostat systems. ## Description VIIVRIA 24V Transformer is specifically designed to optimize the performance of Nest, Ecobee, Honeywell and Sensi smart thermostats; Also compatible with Ring, Eufy Video Doorbell, Ring Video Doorbell 2, Ring Video Doorbell Pro, Nest Skybell Doorbell, and other devices that require constant 24 volt power for operation 24V/40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Doorbell and All Versions of Ring Doorbell (4011MT) Powers thermostats and doorbells: replace underpowered transformers Easy to install: screw down and thread clamps to electrical box Input is 120 VAC, 60 Hz; Output: 24 V/ 40 VA This 24v transformer fits for Nest, Ecobee, Honeywell and Sensi smart thermostats; Also compatible with Ring Video Doorbell, Ring Video Doorbell 2, Ring Video Doorbell Pro, Nest Skybell Doorbell, and other devices that require constant 24 volt power for operation. About VIIVRIA: VIIVRIA specializes in high-quality digital accessories, delivering reliable products for modern homes. We focus on providing durable solutions and exceptional customer service, ensuring satisfaction with every purchase. Review: Works but light is on - Wired to a Ring Doorbell Plus. I learned a lot. First, the Ring doorbell still needs the battery installed despite the hard wired power. Second, it charges very slow but it does charge. Third, the led light around the push button stays on all the time. I understand I should add a resistor or diode but those instructions were not given. Still, the unit is working and was easy to install. Review: Perfect replacement upgrade and works well! - Fast shipping, works great. I had a underpowered transformer (10VA) that was installed in a new build house by the builder. Upgraded and I installed this model and it solved all my issues with my Ring video doorbell (Ring app said I was under powered) and my actual doorbell ringer that would sort of buzz at real low volume with original transformer powering it. ## Features - Universal Compatibility - Certified for Ring Video Doorbell Pro/2, Nest Hello, Wyze, Eufy & most 16-24V smart doorbells. Includes dual-input terminals for thermostats/chime - Zero Voltage Drop & Anti-Overheat - Patented copper-core design maintains stable 24V output even under 40VA max load, eliminating "low voltage warnings" and extending doorbell lifespan by 3X - Power Multiple Thermostats/Doorbells - Replace and upgrade underpowered transformers with this 24V AC Transformer, while providing ample power to single or multiple thermostats and doorbells（Perfect replacement for an old transformer and will work with any wired door chime） - Easy to Install - The doorbell transformer is easy to replace and install with screws, unscrews or threaded clips to the electrical box, in a safe place - Trusted Brand Expertise - VIIVRIA has been specializing in digital accessories for years, consistently delivering high-quality products and services. We are committed to providing reliable, durable solutions for modern homes, with a focus on customer satisfaction and product performance ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07Q4PPKQ8 | | Best Sellers Rank | #14,062 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #7 in Door Bell Transformers | | Brand | VIIVRIA | | Brand Name | VIIVRIA | | Current Rating | 0.5 Amps | | Customer Reviews | 4.3 out of 5 stars 993 Reviews | | Included Components | 24V 40VA Doorbell Transformer | | Item Dimensions D x W x H | 2"D x 2"W x 3"H | | Manufacturer | ZKRFID | | Maximum Frequency | 60 Hz | | Minimum Frequency | 60 Hz | | Model | 071231723668 | | Mounting Type | Wall Mount | | Part Number | UD24-40VA | | Power Source | Corded Electric | | Product Dimensions | 2"D x 2"W x 3"H | | Specification Met | UL | | UPC | 712317236668 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** VIIVRIA - **Current Rating:** 0.5 Amps - **Mounting Type:** Wall Mount - **Power Source:** Corded Electric - **Product Dimensions:** 2"D x 2"W x 3"H ## Images ![VIIVRIA 24V 40VA Doorbell Transformer - Heavy-Duty Copper Core for Ring Pro/2 & Nest Hello, Easy Install Hardwired Power Supply, Thermostat/Chime Compatible - Image 1](https://m.media-amazon.com/images/I/61e2oYsTj4L.jpg) ![VIIVRIA 24V 40VA Doorbell Transformer - Heavy-Duty Copper Core for Ring Pro/2 & Nest Hello, Easy Install Hardwired Power Supply, Thermostat/Chime Compatible - Image 2](https://m.media-amazon.com/images/I/51qL+wqNcTL.jpg) ![VIIVRIA 24V 40VA Doorbell Transformer - Heavy-Duty Copper Core for Ring Pro/2 & Nest Hello, Easy Install Hardwired Power Supply, Thermostat/Chime Compatible - Image 3](https://m.media-amazon.com/images/I/51USXkFgGHL.jpg) ![VIIVRIA 24V 40VA Doorbell Transformer - Heavy-Duty Copper Core for Ring Pro/2 & Nest Hello, Easy Install Hardwired Power Supply, Thermostat/Chime Compatible - Image 4](https://m.media-amazon.com/images/I/61RcQmCeBDL.jpg) ![VIIVRIA 24V 40VA Doorbell Transformer - Heavy-Duty Copper Core for Ring Pro/2 & Nest Hello, Easy Install Hardwired Power Supply, Thermostat/Chime Compatible - Image 5](https://m.media-amazon.com/images/I/61fIintV9vL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works but light is on *by M***D on April 11, 2026* Wired to a Ring Doorbell Plus. I learned a lot. First, the Ring doorbell still needs the battery installed despite the hard wired power. Second, it charges very slow but it does charge. Third, the led light around the push button stays on all the time. I understand I should add a resistor or diode but those instructions were not given. Still, the unit is working and was easy to install. ### ⭐⭐⭐⭐⭐ Perfect replacement upgrade and works well! *by K***3 on May 13, 2026* Fast shipping, works great. I had a underpowered transformer (10VA) that was installed in a new build house by the builder. Upgraded and I installed this model and it solved all my issues with my Ring video doorbell (Ring app said I was under powered) and my actual doorbell ringer that would sort of buzz at real low volume with original transformer powering it. ### ⭐⭐⭐⭐⭐ Works with my Nest doorbell camera. *by M***X on April 27, 2026* Works as expected on my Nest doorbell camera. ## Frequently Bought Together - VIIVRIA Doorbell Transformer 24V 40VA for Ring Video Doorbells, Hardwired Door Chime Transformer Power Supply, Compatible with Ring and Nest Hello Video Doorbells - Ring Video Doorbell Wired (newest model), Use Two-Way Talk, advanced motion detection, HD camera and real-time alerts to monitor your front door (wiring required) - Ring Chime --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/138876118-viivria-24v-40va-doorbell-transformer-heavy-duty-copper-core-ring](https://www.desertcart.vu/products/138876118-viivria-24v-40va-doorbell-transformer-heavy-duty-copper-core-ring) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-06-09*