--- product_id: 52450656 title: "Kidde KF20 Optical Smoke Alarm" brand: "kidde" price: "¥10265" currency: JPY in_stock: true category: "Kidde" url: https://www.desertcart.jp/products/52450656-kidde-kf20-optical-smoke-alarm store_origin: JP region: Japan --- # 9V battery backup Interlink up to 23 alarms 6-year warranty Kidde KF20 Optical Smoke Alarm **Brand:** kidde **Price:** ¥10265 **Availability:** ✅ In Stock ## Summary > 🔥 Stay ahead of danger with Kidde KF20 — your smart shield against fire! 🛡️ ## Quick Answers - **What is this?** Kidde KF20 Optical Smoke Alarm by kidde - **How much does it cost?** ¥10265 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/52450656-kidde-kf20-optical-smoke-alarm) ## Best For - kidde enthusiasts ## Why This Product - Trusted kidde brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Connected Protection:** Interlink up to 23 Firex series alarms for comprehensive, synchronized fire detection across your property. - • **Uninterrupted Safety:** Mains powered with 9V alkaline battery backup ensures your home stays protected even during power outages. - • **User-Friendly Design:** LED status indicator, test and hush button, plus low battery warning chirp for effortless monitoring and maintenance. - • **Certified Reliability:** CE and Kitemarked to BS EN 14604:2005, meeting the latest BS 5839-6:2019 Grade D2 standards for trusted performance. - • **Hassle-Free Installation:** Comes with all fixings and clear instructions, making setup quick and easy—plus a reassuring 6-year manufacturer’s warranty. ## Overview The Kidde KF20 Optical Smoke Alarm combines mains power with a 9V battery backup to ensure continuous fire detection. It can interlink with up to 23 other alarms for full-home coverage, is certified to rigorous UK safety standards, and features user-friendly controls including LED indicators and hush functionality. Easy to install with included fixings and backed by a 6-year warranty, it’s a reliable, professional-grade safety solution for modern homes. ## Description Kidde KF20 Optical Smoke Alarm : desertcart.co.uk: DIY & Tools ## Features - Mains powered smoke alarm with 9 volt alkaline battery back-up. - Interlink with up to 23 other alarms in the Firex series to create all round fire protection. - CE marked and Kitemarked to BS EN 14604: 2005 and suitable for installations complying to BS 5839-6: 2019 Grade D2. - LED indicator, test and hush button, low battery warning chirp. - Supplied with fixings; 2 x screws and 2 x rawl plugs and has a 6 year manufacturer’s warranty ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B012CDAWPA | | Alarm | Visual | | Best Sellers Rank | 52,598 in DIY & Tools ( See Top 100 in DIY & Tools ) 128 in Smoke Alarms | | Brand | Kidde | | Colour | White | | Country of Origin | China | | Customer Reviews | 4.6 4.6 out of 5 stars (449) | | Global Trade Identification Number | 00047871259717 | | Included Components | Smoke Alarm Mounting bracket 9V Alkaline battery | | Item Dimensions D x W x H | 13.5D x 5.5W x 13.5H centimetres | | Item Type Name | Smoke Alarm | | Item Weight | 0.24 Kilograms | | Manufacturer | Kidde | | Manufacturer Warranty Description | 6 years. | | Material | Plastic | | Model Number | KF20 | | Number of Items | 1 | | Part Number | KF20 | | Power source | Battery Powered | | Product Style | Classic | | Sensor Type | Photoelectric | | UPC | 047871259717 | | Unit Count | 1.0 count | ## Product Details - **Alarm:** Visual - **Brand:** Kidde - **Colour:** White - **Global Trade Identification Number:** 00047871259717 - **Item weight:** 0.24 Kilograms - **Material:** Plastic - **Power source:** Battery Powered - **Product dimensions:** 13.5D x 5.5W x 13.5H centimetres - **Sensor type:** Photoelectric - **Style:** Classic ## Images ![Kidde KF20 Optical Smoke Alarm - Image 1](https://m.media-amazon.com/images/I/71HXHWTdaZL.jpg) ![Kidde KF20 Optical Smoke Alarm - Image 2](https://m.media-amazon.com/images/I/71XOxXJuolL.jpg) ![Kidde KF20 Optical Smoke Alarm - Image 3](https://m.media-amazon.com/images/I/71h1uRw6rwL.jpg) ![Kidde KF20 Optical Smoke Alarm - Image 4](https://m.media-amazon.com/images/I/21s37EszteL.jpg) ![Kidde KF20 Optical Smoke Alarm - Image 5](https://m.media-amazon.com/images/I/91wfEhxS4UL.jpg) ## Questions & Answers **Q: I have a kf1r. whats the model to use that will fit the back plate. i also assume that the connectors are the same.** A: The KF1R is the 2nd generation and discontinued by the manufacturer. The compatible replacement for this is the KF10R. The KF10, KF10LL, KF10R, KF20, KF20LL, KF20R, KF30, KF30LL and KF30R all come with a mounting plate so can also be used as a replacement. **Q: I have at the moment 2 kidde firex kf2 4973 fitted and one appears to be faulty. is this unit compatible as a replacement** A: As far as I can tell the KF20 is a direct replacement for the 4973, see this quote from an online seller :- " The Kidde KF20 / 4973 is a 230V Optical Smoke Detector with Alkaline Battery Back Up from the Kidde Firex range." The mains connector blocks look exactly the same. Hope that helps. **Q: what new model has replaced the old Firex 120-1125E please?** A: This is the replacement **Q: Can this replace a kf10** A: Yes it can --- ## 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.jp/products/52450656-kidde-kf20-optical-smoke-alarm](https://www.desertcart.jp/products/52450656-kidde-kf20-optical-smoke-alarm) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-05-16*