--- product_id: 48026396 title: "BT 4-Tone Loud Indoor Ringer – Easy Plug In & Use - Tonecaller II Loud Extension" brand: "bt" price: "฿147" currency: THB in_stock: false reviews_count: 13 url: https://www.desertcart.co.th/products/48026396-bt-4-tone-loud-indoor-ringer-easy-plug-in-use store_origin: TH region: Thailand --- # Plug & Play 3m cable 4-tone options BT 4-Tone Loud Indoor Ringer – Easy Plug In & Use - Tonecaller II Loud Extension **Brand:** bt **Price:** ฿147 **Availability:** ❌ Out of Stock ## Summary > 🔔 Stay Alert, Stay Connected! ## Quick Answers - **What is this?** BT 4-Tone Loud Indoor Ringer – Easy Plug In & Use - Tonecaller II Loud Extension by bt - **How much does it cost?** ฿147 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/48026396-bt-4-tone-loud-indoor-ringer-easy-plug-in-use) ## Best For - bt enthusiasts ## Why This Product - Trusted bt brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Setup:** Simply plug in and play—no complicated installation needed. - • **Compact & Discreet:** Lightweight design fits seamlessly into any space. - • **Never Miss a Call!:** Choose from 4 distinct tones and adjustable volume. - • **Flexible Positioning:** 3m cable allows for versatile placement near your phone. - • **Power-Free Convenience:** No mains power required—just a double socket adaptor. ## Overview The BT 4-Tone Loud Indoor Ringer is a user-friendly extension that ensures you never miss a call. With four pitch settings and volume control, this compact device is designed for easy installation and flexible positioning, making it a perfect addition to any home or office. ## Description Product Description BT 4-Tone Loud Indoor Telephone RingerThe ToneCaller from BT, with its loud adjustable tone makes it easier to know when your phone is ringing.It features an extra audible alert if you are having problems hearing your telephone ring.With a choice of four different pitch settings and easy-change volume control, plug this additional bell into a spare telephone socket or use a socket adaptor to plug it in beside your existing phone.Telephone lines usually have a REN of 4 ~ they can operate up to four telephone products (e.g., phones, fax, answering machine) each with a REN of 1. The ToneCaller has a REN of 1. Box Contains BT 4-Tone Loud IndoorTelephone RingerScrews and PlugsSticky PadScrew Hole Guide ## Features - Simple Plug And Play solution - supplied with all fixtures and fittings - Choice of four different pitch settings and volume control to ensure you never miss a call - Compact and lightweight design - can be easily positioned out of sight - Cable length - 3m - Requires a double socket adaptor in order to connect next to your telephone - does not require mains power ## Images ![BT 4-Tone Loud Indoor Ringer – Easy Plug In & Use - Tonecaller II Loud Extension - Image 1](https://m.media-amazon.com/images/I/51t+n1iBApL.jpg) ![BT 4-Tone Loud Indoor Ringer – Easy Plug In & Use - Tonecaller II Loud Extension - Image 2](https://m.media-amazon.com/images/I/41tws+rp1vL.jpg) ![BT 4-Tone Loud Indoor Ringer – Easy Plug In & Use - Tonecaller II Loud Extension - Image 3](https://m.media-amazon.com/images/I/41X1WAm6pDL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Loud auxiliary ringer *by D***F on Reviewed in the United Kingdom on 2 March 2016* Purchased on recommendation after missing a number of phone calls due to a mild hearing issue, this indoor ringer simply plugs into an existing phone socket or via a signal splitter. Most households allow 4 REN to be used on a single phoneline, so as a phone typically = 1 REN you can have up to four around the house. This device also uses 1 REN, so make sure you aren't exceeding that allowance before purchase. There are two dials on the device, one to adjust volume, the other to select one of four preset rings at different pitches, simply select position 1-4 to choose the ring that best suits you. I can see two purposes for this device, either the louder ring I require or to plug in to a socket in another room to alert that the phone is ringing elsewhere in the house or, for instance whilst out in the garden. It's certainly loud enough to provide an alert for me as I no longer miss calls. ### ⭐ 1.0 out of 5 stars A not-vety-loud Indoor Ringer *by J***D on Reviewed in the United Kingdom on 27 October 2019* This product is easy to install but is it worth installing? I am still missing calls even though it is situated right in the middle of a (small) house. It has four volume settings, the first three are useless and the max setting still does not do the job. Not impressed. ### ⭐⭐⭐⭐ 4.0 out of 5 stars Works great. Our phone is in the front of the ... *by M***D on Reviewed in the United Kingdom on 28 November 2015* Works great. Our phone is in the front of the house. I use this for the back of the house so we can hear it ring. Would have given 5 Stars if the lead was shorter, or even better if it plugged straight into the socket. --- ## 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.co.th/products/48026396-bt-4-tone-loud-indoor-ringer-easy-plug-in-use](https://www.desertcart.co.th/products/48026396-bt-4-tone-loud-indoor-ringer-easy-plug-in-use) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-23*