--- product_id: 466029032 title: "Sandman - Ring Voltage Booster II for Bridged Ringing - Increases Ring Current to 7.5 REN and Voltage to 90VAC RMS - True Sine Wave Output Makes Any Device with Analog Port Ring - Easy Installation" brand: "sandman.com" price: "€ 5.24" currency: EUR in_stock: false reviews_count: 8 url: https://www.desertcart.pt/products/466029032-sandman-ring-voltage-booster-ii-for-bridged-ringing-increases-ring store_origin: PT region: Portugal --- # 90VAC Boost 7.5 REN Current Plug & Play Sandman - Ring Voltage Booster II for Bridged Ringing - Increases Ring Current to 7.5 REN and Voltage to 90VAC RMS - True Sine Wave Output Makes Any Device with Analog Port Ring - Easy Installation **Brand:** sandman.com **Price:** € 5.24 **Availability:** ❌ Out of Stock ## Summary > 🔔 Ring in the Future of Communication! ## Quick Answers - **What is this?** Sandman - Ring Voltage Booster II for Bridged Ringing - Increases Ring Current to 7.5 REN and Voltage to 90VAC RMS - True Sine Wave Output Makes Any Device with Analog Port Ring - Easy Installation by sandman.com - **How much does it cost?** € 5.24 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/466029032-sandman-ring-voltage-booster-ii-for-bridged-ringing-increases-ring) ## Best For - sandman.com enthusiasts ## Why This Product - Trusted sandman.com brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Crystal Clear Sound:** Experience true sine wave output for reliable and clear ringing. - • **Effortless Installation:** Enjoy a hassle-free setup with a simple plug-and-play design. - • **Boost Your Ringing Power:** Elevate your home or office with a robust 90VAC ring voltage. - • **Optimized for Bridged Setups:** Ensure consistent ringing performance across bridged configurations. - • **Expand Your Communication Network:** Seamlessly add more phones with compatibility for VoIP and analog systems. ## Overview The Sandman - Ring Voltage Booster II enhances your ringing capabilities by increasing the ring current to 7.5 REN and voltage to 90VAC RMS. It supports a variety of systems, including VoIP and analog ports, ensuring compatibility with a wide range of telephones. With true sine wave output, it guarantees clear ringing sounds, and its plug-and-play design makes installation a breeze. ## Description Buy Sandman - Ring Voltage Booster II for Bridged Ringing - Increases Ring Current to 7.5 REN and Voltage to 90VAC RMS - True Sine Wave Output Makes Any Device with Analog Port Ring - Easy Installation: Signal Boosters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: You're Paying for Quality - Works like a Charm - Works perfectly. New VOIP line was unable to generate a ring in my Western Electric 500 telephone, even though it had worked with other modems for a few years now (this is after switching the internals from ground ring to tip-and-ring ringing). While pricey, this phone now rings clear and brightly, with a classic rolling ring sound. If anything, it's too strong--I have to keep the phone set to the quietest ring volume. Review: Did not work with ht801 Vonage adapter - On your vonage phone line, dial *** then 02 when asked for a command. It will give you the ip address of the box. Go there on your browser and login with 123. On the status page, go to the run test page. Pick the REN test and run it. It will give the number. Max is 3. The ht801 does not produce enough ring voltage to run this item. Get rid of old phones with high REN values and get below 3 and your phone will ring without adding this product. ## Features - Increase Ring Voltage & Current- Boosts ring voltage to 90VAC at 20 cycles, ideal for external ringers and telephones with mechanical bells. Increases ring current to 7.5 REN. Boosts ringing on any device that provides a port for analog telephones. - Add More Phones To Home Or Office - Supports various systems, including VoIP, analog ports, FXS, and Magic Jack, for easy network expansion, compatible with a wide range of landline telephones. - True Sine Wave Output -True Sine Wave Output ensures that your device rings with clear and reliable sound for compatible phones. LED indicator shows when the ring voltage is being boosted. Modular RJ-11 Jacks for easy connection to telephone lines or station ports. - Simple Plug and Play - Effortless setup with plug and play design, including a regulated power cube and line cord, making it easy to install and use with external ringer for telephones. - Bridged Ringing Support - Optimized performance for bridged setups, ensuring consistent and reliable ring signals, compatible with systems featuring bridged configurations for your landline telephone. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09V8C8CLQ | | Best Sellers Rank | #270,314 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #482 in Cell Phone Signal Boosters | | Customer Reviews | 4.1 4.1 out of 5 stars (15) | | Date First Available | March 10, 2022 | | Item Weight | 12.6 ounces | | Item model number | KIT8R | | Manufacturer | sandman.com, Inc. | | Package Dimensions | 9.61 x 3.43 x 3.31 inches | ## Images ![Sandman - Ring Voltage Booster II for Bridged Ringing - Increases Ring Current to 7.5 REN and Voltage to 90VAC RMS - True Sine Wave Output Makes Any Device with Analog Port Ring - Easy Installation - Image 1](https://m.media-amazon.com/images/I/51qTb9BZeGL.jpg) ![Sandman - Ring Voltage Booster II for Bridged Ringing - Increases Ring Current to 7.5 REN and Voltage to 90VAC RMS - True Sine Wave Output Makes Any Device with Analog Port Ring - Easy Installation - Image 2](https://m.media-amazon.com/images/I/71PSVefau0L.jpg) ![Sandman - Ring Voltage Booster II for Bridged Ringing - Increases Ring Current to 7.5 REN and Voltage to 90VAC RMS - True Sine Wave Output Makes Any Device with Analog Port Ring - Easy Installation - Image 3](https://m.media-amazon.com/images/I/6186YG-DKoL.jpg) ![Sandman - Ring Voltage Booster II for Bridged Ringing - Increases Ring Current to 7.5 REN and Voltage to 90VAC RMS - True Sine Wave Output Makes Any Device with Analog Port Ring - Easy Installation - Image 4](https://m.media-amazon.com/images/I/711LezObjcL.jpg) ![Sandman - Ring Voltage Booster II for Bridged Ringing - Increases Ring Current to 7.5 REN and Voltage to 90VAC RMS - True Sine Wave Output Makes Any Device with Analog Port Ring - Easy Installation - Image 5](https://m.media-amazon.com/images/I/71XfH5gCmwL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ You're Paying for Quality - Works like a Charm *by J***N on July 20, 2025* Works perfectly. New VOIP line was unable to generate a ring in my Western Electric 500 telephone, even though it had worked with other modems for a few years now (this is after switching the internals from ground ring to tip-and-ring ringing). While pricey, this phone now rings clear and brightly, with a classic rolling ring sound. If anything, it's too strong--I have to keep the phone set to the quietest ring volume. ### ⭐⭐⭐ Did not work with ht801 Vonage adapter *by A***R on September 4, 2022* On your vonage phone line, dial *** then 02 when asked for a command. It will give you the ip address of the box. Go there on your browser and login with 123. On the status page, go to the run test page. Pick the REN test and run it. It will give the number. Max is 3. The ht801 does not produce enough ring voltage to run this item. Get rid of old phones with high REN values and get below 3 and your phone will ring without adding this product. ### ⭐⭐⭐⭐⭐ Power to extension phone ringers. *by D***T on January 7, 2026* Allows a seamless transition from Ma Bell to VOLP. A must have for customers who want to keep multiple traditional extension phones operational. --- ## 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.pt/products/466029032-sandman-ring-voltage-booster-ii-for-bridged-ringing-increases-ring](https://www.desertcart.pt/products/466029032-sandman-ring-voltage-booster-ii-for-bridged-ringing-increases-ring) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-05-18*