--- product_id: 334346441 title: "Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack" brand: "blackt electrotech" price: "€ 25.82" currency: EUR in_stock: true reviews_count: 8 category: "Blackt Electrotech" url: https://www.desertcart.be/products/334346441-blackt-electrotech-bt35f-updated-smoke-detection-sensor-alarm-diy-2 store_origin: BE region: Belgium --- # Wireless, no wiring needed 85 dB loud alarm 1+ year battery life Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack **Brand:** blackt electrotech **Price:** € 25.82 **Availability:** ✅ In Stock ## Summary > 🔥 Stay ahead of danger with silent confidence 🔊 ## Quick Answers - **What is this?** Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack by blackt electrotech - **How much does it cost?** € 25.82 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/334346441-blackt-electrotech-bt35f-updated-smoke-detection-sensor-alarm-diy-2) ## Best For - blackt electrotech enthusiasts ## Why This Product - Trusted blackt electrotech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Instant Fire Alert:** 85 dB siren cuts through noise for immediate safety awareness - • **Long-Lasting Power:** Runs on a 9V battery with over a year of continuous monitoring - • **Effortless DIY Setup:** No wiring or assembly—mount and protect in minutes - • **Smart Status Indicators:** LED flashes for standby and rapid alerts for smoke detection - • **Humidity-Resistant Design:** Built to perform reliably even in high humidity environments ## Overview The Blackt Electrotech BT35F Smoke Detector 2-pack offers reliable, wireless smoke detection with a piercing 85 dB alarm. Designed for easy DIY installation and maintenance-free operation, it features long-lasting battery life, smart LED status indicators, and anti-humidity technology—perfect for millennial professionals seeking seamless, trustworthy fire safety at home or office. ## Description Product Description Smoke Detector with 85 dB Alarm | BT35 Reliable Fire Safety Protection Reliable Smoke Detection Detect smoke early with a loud 85 dB alarm for reliable protection in homes, apartments, hotels, and offices. Easy DIY installation, maintenance-free operation, and dependable smoke detection for everyday safety. Built for continuous monitoring with LED status indication and quick smoke detection when it matters most. Compact, reliable, and easy to install—helping protect your family and property from fire hazards. 1. What type of fire does this smoke detector identify? It detects smoke generated by developing fires and triggers an 85dB alarm to provide early warning for safer evacuation. 1. What type of fire does this smoke detector identify? It detects smoke generated by developing fires and triggers an 85dB alarm to provide early warning for safer evacuation. 2. How loud is the alarm? The built-in siren produces an 85dB alarm, making it loud enough to alert occupants in nearby rooms during emergencies. 2. How loud is the alarm? The built-in siren produces an 85dB alarm, making it loud enough to alert occupants in nearby rooms during emergencies. 3. What area can one detector cover? One unit provides effective smoke detection coverage for areas up to approximately 25 square meters under normal conditions. 3. What area can one detector cover? One unit provides effective smoke detection coverage for areas up to approximately 25 square meters under normal conditions. 4. Does it require wiring for installation? No, it operates on a 9V battery (not included) and can be mounted easily on a ceiling or wall without wiring. 4. Does it require wiring for installation? No, it operates on a 9V battery (not included) and can be mounted easily on a ceiling or wall without wiring. 5. How do I know the detector is working? The LED flashes once every minute in standby mode and flashes rapidly with the alarm when smoke is detected. 5. How do I know the detector is working? The LED flashes once every minute in standby mode and flashes rapidly with the alarm when smoke is detected. Compare Smoke Alarms BT35 Smoke Alarm BT35W WiFi Smoke Fire Sensor 85dB BT35F 2 Pack Review: Good - Good senser must provide cell .. Review: Does its purpose - Does its purpose tested with smoke also working but battery should be included ## Features - Faster/Safer Delivery : Continuous Monitoring system, Alarm Unit with 85 dB Alarm Signal - Optical Wireless smoke detector/Sensor/ Fault Signal warning (by Audio & visual) / No need any assembly or wiring - Discharged battery indicator/ Test Button/ 9 Volt Battery can use. (Battery Life more than year*) - Low Power consumption processing/ Special Anti- Humidity More Customer Care : Whapp/Mb: 9657707702 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0946XVYM2 | | Alarm | Yes | | Best Sellers Rank | #3,134 in Home Improvement ( See Top 100 in Home Improvement ) #10 in Fire Safety | | Brand | Blackt Electrotech | | Colour | White | | Country of Origin | China | | Customer Reviews | 3.7 out of 5 stars 135 Reviews | | Item Weight | 240 Grams | | Manufacturer | Blackt Electrotech | | Number of Items | 2 | | Operating Humidity | 95 percent | | Power Source | Battery Powered | | Product Style | Alarm | | Sensor Type | optical | | Style | Alarm | | Unit Count | 2.0 Count | | Upper Temperature Range | 50 Degrees Celsius | ## Product Details - **Brand:** Blackt Electrotech - **Style:** Alarm - **Power Source:** Battery Powered - **Colour:** White - **Item Weight:** 240 Grams - **Alarm:** Yes - **Operating Humidity:** 95 percent - **Upper Temperature Rating:** 50 Degrees Celsius - **Sensor Type:** optical - **Number of Items:** 2 ## Images ![Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack - Image 1](https://m.media-amazon.com/images/I/71CYglJD-SL.jpg) ![Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack - Image 2](https://m.media-amazon.com/images/I/61VAjDa1Z5L.jpg) ![Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack - Image 3](https://m.media-amazon.com/images/I/61YmXqI+IbL.jpg) ![Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack - Image 4](https://m.media-amazon.com/images/I/61EJqNuIq8L.jpg) ![Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack - Image 5](https://m.media-amazon.com/images/I/71FM4peV8XL.jpg) ## Questions & Answers **Q: 1. What type of fire does this smoke detector identify?** A: It detects smoke generated by developing fires and triggers an 85dB alarm to provide early warning for safer evacuation. **Q: 2. How loud is the alarm?** A: The built-in siren produces an 85dB alarm, making it loud enough to alert occupants in nearby rooms during emergencies. **Q: 3. What area can one detector cover?** A: One unit provides effective smoke detection coverage for areas up to approximately 25 square meters under normal conditions. **Q: 4. Does it require wiring for installation?** A: No, it operates on a 9V battery (not included) and can be mounted easily on a ceiling or wall without wiring. **Q: 5. How do I know the detector is working?** A: The LED flashes once every minute in standby mode and flashes rapidly with the alarm when smoke is detected. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good *by M***L on 15 June 2026* Good senser must provide cell .. ### ⭐⭐⭐⭐ Does its purpose *by S***R on 5 July 2026* Does its purpose tested with smoke also working but battery should be included ### ⭐ 1 month life *by P***N on 5 February 2024* It stops working within 1 month. don’t buy. as a safety product it should work long but the quality is very poor. imagine you placed the device where you are fully relying on the device but it didn’t worked when needed. ## Frequently Bought Together - Blackt Electrotech(BT35F): Updated Smoke Detection Sensor Alarm DIY 2 PC Pack - Blackt Electrotech BT35 DIY Smoke Detection Sensor System with Alarm 85 dB Easy Installation and Maintenance Free for Small Family, Hotel, and Apartment (White) - Fire Stop Car and Home Fire Extinguisher (Pack of 2) --- ## 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.be/products/334346441-blackt-electrotech-bt35f-updated-smoke-detection-sensor-alarm-diy-2](https://www.desertcart.be/products/334346441-blackt-electrotech-bt35f-updated-smoke-detection-sensor-alarm-diy-2) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-08-14*