--- product_id: 2072181 title: "Kidde KN-COSM-BA Battery-Operated Combination Carbon Monoxide and Smoke Alarm with Talking Alarm , WHITE" brand: "kidde" price: "₨1314" currency: LKR in_stock: false url: https://www.desertcart.lk/products/2072181-kidde-kn-cosm-ba-battery-operated-combination-carbon-monoxide-smoke store_origin: LK region: Sri Lanka --- # Talking alarm announces hazard type Battery safeguard prevents missing batteries Easy install, no wiring needed Kidde KN-COSM-BA Battery-Operated Combination Carbon Monoxide and Smoke Alarm with Talking Alarm , WHITE **Brand:** kidde **Price:** ₨1314 **Availability:** ❌ Out of Stock ## Summary > 🚨 Speak Up for Safety: The Alarm That Talks So You Don’t Have To! ## Quick Answers - **What is this?** Kidde KN-COSM-BA Battery-Operated Combination Carbon Monoxide and Smoke Alarm with Talking Alarm , WHITE by kidde - **How much does it cost?** ₨1314 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/2072181-kidde-kn-cosm-ba-battery-operated-combination-carbon-monoxide-smoke) ## 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 - • **Clear Voice Alerts:** Hear exactly what’s wrong with loud, distinct warnings for fire, CO, and low battery—no guesswork. - • **Smart Hush Feature:** Silence nuisance alarms safely for 10 minutes with a voice-confirmed hush mode—no more smoky dinner panic. - • **UL-Certified Safety:** Meets rigorous Underwriters Laboratories standards with a 10-year limited warranty for peace of mind. - • **Dual Hazard Protection:** One sleek device covers both smoke and carbon monoxide detection, replacing two alarms with one. - • **Hassle-Free Installation:** Battery-powered and wire-free, install anywhere in minutes—perfect for renters and busy pros. ## Overview The Kidde KN-COSM-BA is a battery-operated combination smoke and carbon monoxide alarm featuring a unique talking alarm system that clearly announces the hazard type detected. It uses ionization sensing technology for fast fire detection and includes a hush button to silence false alarms. Designed for easy installation without wiring, it runs on three AA batteries and meets UL safety standards. With a compact white design, tamper-resistant features, and a 10-year limited warranty, it offers reliable, dual hazard protection for any home. ## Description Product Description When every second counts, you'll have your warnings spoken to you in a loud-volume voice: “Fire, Fire!” or “Warning! Carbon Monoxide!” Two-alarm system also announces “Low Battery” when batteries need changing. Also includes chirp signal, flashing LED and test/reset button. Uses three AA batteries (included). From the Manufacturer The leading cause of accidental poisoning deaths in North America, Carbon Monoxide is odorless, tasteless and invisible. It is a silent killer. Kidde CO alarms include the most accurate sensing technology available, the patented Nighthawk electrochemical sensor. This unit combines a Carbon Monoxide and an Ionization Smoke Alarm, providing two important safety devices in a single unit. This alarm includes a voice warning system that announces "Fire, Carbon Monoxide, Low Battery or Smart Hush Activation." The voice alarm eliminates any confusion and clearly warns you and your family of a smoke or carbon monoxide danger, or if your battery is in need of replacement. This combination alarm is battery operated, protecting you and your family even during a power outage when many incidences occur. Install at least one CO alarm on every floor and in sleeping areas. Make sure CO and Smoke alarms are at least 15 feet away from cooking or heating appliances to prevent false alarms. Replace CO alarms every 5 to 7 years to benefit from the latest technology upgrades. Replace smoke alarms every ten years. ## Features - Talking alarm announces the hazard type detected, helping to speed up reaction time - A single unit can be installed where previously two were needed - Battery safeguard ensures the unit cannot be accidentally mounted without batteries installed - Test-reset button tests alarm circuitry and triggers the voice announcement - Meets requirements of Underwriters Laboratories (UL), an independent facility that tests products for safety compliance ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00004WA4C | | Alarm | Audible | | Best Sellers Rank | #621,467 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #146 in Smoke & Carbon Monoxide Alarms | | Brand | Kidde | | Built-In Media | 900-0102 | | Color | WHITE | | Customer Reviews | 4.5 out of 5 stars 1,552 Reviews | | Enclosure Material | Bamboo | | Global Trade Identification Number | 00784908010209 | | Item Dimensions D x W x H | 1.8"D x 5.6"W x 5.6"H | | Item Type Name | 900-0102 | | Item Weight | 10.4 ounces | | Manufacturer | Kidde Safety | | Manufacturer Warranty Description | Ten-year limited warranty | | Mfr Part Number | 900010202 | | Model Number | KN-COSM-BA | | Number of Items | 1 | | Operating Humidity | 10 to 95% relative humidity (RH), non-condensing | | Power Source | Battery Powered | | Product Dimensions | 1.8"D x 5.6"W x 5.6"H | | Product Style | Previous Model | | Sensor Type | Ionization | | Style | Previous Model | | UPC | 251221511138 783324977752 047871072866 784908010209 047871090686 094700377241 | | Unit Count | 1 Count | | Upper Temperature Rating | 100 °F | ## Product Details - **Alarm:** Audible - **Brand:** Kidde - **Color:** WHITE - **Item Weight:** 10.4 ounces - **Operating Humidity:** 10 to 95% relative humidity (RH), non-condensing - **Power Source:** Battery Powered - **Product Dimensions:** 1.8"D x 5.6"W x 5.6"H - **Sensor Type:** Ionization - **Style:** Previous Model - **Upper Temperature Rating:** 100 Degrees Fahrenheit ## Images ![Kidde KN-COSM-BA Battery-Operated Combination Carbon Monoxide and Smoke Alarm with Talking Alarm , WHITE - Image 1](https://m.media-amazon.com/images/I/51+CIUg7YJL.jpg) ## Questions & Answers **Q: ceiling** A: According to the mounting instructions, the best place to mount the Kidde KN-COSM-B is on the ceiling 4 inches 4 inches away from any wall; however, also in the installation instructions, an acceptable mounting can be done on a wall 4 inches below the ceiling but no more than 12 inches from the ceiling. **Q: I thought carbon monoxide detectors should be installed close to the ground?** A: Molecular weight of air (the mixture of gasses) is 29 g/mol, and molecular weight of CO is 28 g/mol. Air is mostly nitrogen, N2, and its molecular weight is 28 g/mol. In a still room, CO would have a slight tendency to rise. In an average house with some activity, CO would be evenly dispersed. Bottom line is that you could put the detector at any height and it should be okay, but higher would be marginally better.Contrast this with carbon dioxide, CO2, which has a molecular weight of 44 g/mol. This is significantly heavier than air. When I ferment my homebrew in a chest freezer, the generated CO2 doesn't come out quickly when I open the top. I can lower a flame into it, and it will extinguish when it hits the CO2 level. Try it, it's fun!M.Hall, Ph.D. **Q: Does this detector have a hush feature?** A: It DOES have a hush feature. Pushing the test/reset button temporarily desensitizes the smoke alarm for approximately 10 minutes. It will automatically reset and sound again if smoke is still present. This process can be repeated until the air has cleared. **Q: Is it suitable for a RV?** A: I would think so. It runs on batteries so you can put it up anywhere. --- ## 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.lk/products/2072181-kidde-kn-cosm-ba-battery-operated-combination-carbon-monoxide-smoke](https://www.desertcart.lk/products/2072181-kidde-kn-cosm-ba-battery-operated-combination-carbon-monoxide-smoke) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-10-22*