--- product_id: 17257614 title: "First Alert Battery Powered SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location" brand: "first alert" price: "€ 8.13" currency: EUR in_stock: false reviews_count: 8 url: https://www.desertcart.gr/products/17257614-first-alert-battery-powered-sco500b-wireless-interconnected-photoelectric-smoke-carbon store_origin: GR region: Greece --- # Wireless interconnect via RF tech Battery-powered for flexible placement Voice alerts specify danger & location First Alert Battery Powered SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location **Brand:** first alert **Price:** € 8.13 **Availability:** ❌ Out of Stock ## Summary > 🚨 Stay ahead of danger with smart, wireless peace of mind! ## Quick Answers - **What is this?** First Alert Battery Powered SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location by first alert - **How much does it cost?** € 8.13 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/17257614-first-alert-battery-powered-sco500b-wireless-interconnected-photoelectric-smoke-carbon) ## Best For - first alert enthusiasts ## Why This Product - Trusted first alert brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Dual Threat Detection:** Photoelectric smoke sensor plus carbon monoxide monitoring in one sleek device. - β€’ **Compact & Stylish Design:** Slim 5.13" square profile fits discreetly in any modern home or office. - β€’ **Effortless Wireless Safety Network:** Connect multiple alarms seamlesslyβ€”no wiring needed, just pure peace of mind. - β€’ **Long-Lasting Lithium Battery Power:** Includes 2 lithium metal batteries for reliable, maintenance-free protection. - β€’ **Clear, Location-Specific Voice Alerts:** Know exactly what and where the danger isβ€”no guessing, just action. ## Overview The First Alert SCO500B is a battery-powered, wireless interconnected smoke and carbon monoxide alarm featuring photoelectric detection and clear voice alerts that specify the type and location of danger. Its radio frequency communication links multiple units without wiring, creating an integrated home safety network. Compact and easy to install, it includes long-lasting lithium batteries and offers 7 years of trusted protection. ## Description The First Alert SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location detects smoke and elevated carbon monoxide levels and can work with compatible models to create a wireless alert system throughout your home (additional alarms sold separately). For those who want a comprehensive detection system without hiring an electrician or worrying about hardwiring, this battery operated CO smoke detector combo is an ideal solution. Wireless technology connects the detector with other compatible First Alert wireless enabled alarms in your home to create a wireless safety network. Up to 16 compatible alarms can communicate with each other and alert you when there is a problem across the house even in a different room or on a different floor. The photoelectric smoke sensor is designed to reduce false alarms from cooking smoke or shower steam while remaining sensitive to real danger. The advanced electrochemical CO sensor detects carbon monoxide leaks from multiple sources, including faulty fuel burning appliances. A loud 85 decibel siren is designed to wake event he soundest sleepers, and a voice alarm indicates where and what the threat is. Review: Works Great and High Quality Smoke and CO Alarm - I purchased two of these after being unhappy with First Alert ZCOMBO made for Ring, which I returned. This model interconnects with other SCO500B models so that if there is an alert in another part of the house, all alarms beep and give a voice alert. These units cannot connect to my Ring Alarm system. That is fine with me as I discuss in my review of the ZCOMBO model. I had no problems at all with setting up these two units and choosing the voice location feature. So far, no false alarms and the units are working fine. I have read the "one star" reviews and people have had false alarms after a period of time. Mine have been up for one week with no problems but if I start getting false alarms, I will update this review. The distance that these interconnect seems good as I have tested these two in different parts of my house. I will probably buy two more for other areas. One thing that I like about this design is that if it detects CO, the alarm goes off and then it speaks the CO level to let you know how much CO has been detected. As I discussed in my other review of the ZCOMBO unit, people should not just assume that getting a CO alarm means that the unit is broken. There are many possible reasons why CO may be in your house and before declaring them defective, it is important to get a professional or the fire department to check your house. If you do an online search of CO in your house you will see that it is possible that a crack can develop in a furnace causing CO to mix with the heated air. Also, gas appliances such as heaters and even gas stoves, if not vented correctly can cause CO to enter a house. If one of these signals a CO alarm, take it very seriously because your life could be at risk. Don't ever assume that the alarm is simply broken until you are absolutely sure it is. I read a review of this item saying that the alarm on these units might not be heard by older people with hearing loss. The alarm on these units is very loud and someone would really have to be very hard of hearing to not hear this. In fact, when setting these up, you should probably wear ear protection because the alarm is very loud. I would recommend that people wear ear plugs even when testing these alarms. When setting these up, it is important to follow the instructions on the enclosed sheet because it is not easy to figure out without instructions. I found that the setup was easy when following the instructions. There are also some reviews here that have setup instructions, which can also be helpful. I consider these the best units that I could find for warning me about fire or CO when I am home. The only problem is that it will not notify me if I am away from home. I have decided that I am also going to buy two Nest Protect Smoke/CO alarms, one for each level of my home and in rooms that do not have this unit, the First Alert SCO500B. It is simply too expensive for me to buy six Nest Protect alarms which would be close to $700. I think that buying four of these units and two Nest Protect units, I can get a good smoke/CO alarm system at a reasonable price. In the future, if I decide that I want to connect these alarms with my Ring Alarm system, I will purchase a Ring Listener which is designed to be installed near and alarm and will send an alert to the Ring alarm monitoring company. I am still worried about connecting my Ring Alarm with smoke/CO detectors. The reason is that if there is any type of alarm sent, even false ones, Ring monitoring will send out the local fire department and they cannot be recalled. In my city, false alarms will get fined at increasing amounts and your alarm license can be banned for too many false alarms. I think that the First Alert SCO500B is a good smoke/CO alarm and I would recommend this model. Realize though that all smoke alarms are now designed to have a seven year life span. So know that in seven years all these units will have to be replaced with new ones. Review: Working well. - Easy to install. ## Features - The front cover design of the alarm may vary but product function remains the same. - Battery operated smoke and carbon monoxide alarm can be installed easily - Wireless interconnect uses radio frequency communication to connect the alarms, without any electrical wiring needed. - Connects multiple alarms together for wireless safety network (not z-wave compatible) - When your alarms are interconnected, they communicate with each other, forming an integrated system of protection for your home - When one alarm sounds, all alarms will sound - Voice alarm gives clear indication of what the danger is and where it is located ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0064S9IQ4 | | Alarm | Audible | | Best Sellers Rank | #414,103 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #110 in Smoke & Carbon Monoxide Alarms | | Brand | First Alert | | Built-In Media | Alarm, 2-AA batteries | | Color | White | | Customer Reviews | 4.5 out of 5 stars 1,848 Reviews | | Enclosure Material | Carbon | | Global Trade Identification Number | 00029054016324 | | Item Dimensions D x W x H | 2.8"D x 5.13"W x 5.13"H | | Item Type Name | OLCOMBOV Wireless Interconnect Smoke and Carbon Monoxide Combo Alarm w/Voice & Location, Frust Free | | Item Weight | 9.6 ounces | | Manufacturer | BRK | | Manufacturer Warranty Description | 7 | | Mfr Part Number | SCO500B | | Model Number | OLCOMBOVFF | | Number of Items | 1 | | Power Source | Battery Powered | | Product Dimensions | 2.8"D x 5.13"W x 5.13"H | | Product Style | Standard Detection | | Sensor Type | Photoelectric | | Style | Standard Detection | | UPC | 029054016324 | | Unit Count | 1 Count | ## Product Details - **Alarm:** Audible - **Brand:** First Alert - **Color:** White - **Global Trade Identification Number:** 00029054016324 - **Item Weight:** 9.6 ounces - **Material:** Carbon - **Power Source:** Battery Powered - **Product Dimensions:** 2.8"D x 5.13"W x 5.13"H - **Sensor Type:** Photoelectric - **Style:** Standard Detection ## Images ![First Alert Battery Powered SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location - Image 1](https://m.media-amazon.com/images/I/61PHjydRemL.jpg) ![First Alert Battery Powered SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location - Image 2](https://m.media-amazon.com/images/I/71XydNtGa8L.jpg) ![First Alert Battery Powered SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location - Image 3](https://m.media-amazon.com/images/I/61t1A60C-0L.jpg) ![First Alert Battery Powered SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location - Image 4](https://m.media-amazon.com/images/I/61wgm-oPC+L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works Great and High Quality Smoke and CO Alarm *by B***N on June 17, 2021* I purchased two of these after being unhappy with First Alert ZCOMBO made for Ring, which I returned. This model interconnects with other SCO500B models so that if there is an alert in another part of the house, all alarms beep and give a voice alert. These units cannot connect to my Ring Alarm system. That is fine with me as I discuss in my review of the ZCOMBO model. I had no problems at all with setting up these two units and choosing the voice location feature. So far, no false alarms and the units are working fine. I have read the "one star" reviews and people have had false alarms after a period of time. Mine have been up for one week with no problems but if I start getting false alarms, I will update this review. The distance that these interconnect seems good as I have tested these two in different parts of my house. I will probably buy two more for other areas. One thing that I like about this design is that if it detects CO, the alarm goes off and then it speaks the CO level to let you know how much CO has been detected. As I discussed in my other review of the ZCOMBO unit, people should not just assume that getting a CO alarm means that the unit is broken. There are many possible reasons why CO may be in your house and before declaring them defective, it is important to get a professional or the fire department to check your house. If you do an online search of CO in your house you will see that it is possible that a crack can develop in a furnace causing CO to mix with the heated air. Also, gas appliances such as heaters and even gas stoves, if not vented correctly can cause CO to enter a house. If one of these signals a CO alarm, take it very seriously because your life could be at risk. Don't ever assume that the alarm is simply broken until you are absolutely sure it is. I read a review of this item saying that the alarm on these units might not be heard by older people with hearing loss. The alarm on these units is very loud and someone would really have to be very hard of hearing to not hear this. In fact, when setting these up, you should probably wear ear protection because the alarm is very loud. I would recommend that people wear ear plugs even when testing these alarms. When setting these up, it is important to follow the instructions on the enclosed sheet because it is not easy to figure out without instructions. I found that the setup was easy when following the instructions. There are also some reviews here that have setup instructions, which can also be helpful. I consider these the best units that I could find for warning me about fire or CO when I am home. The only problem is that it will not notify me if I am away from home. I have decided that I am also going to buy two Nest Protect Smoke/CO alarms, one for each level of my home and in rooms that do not have this unit, the First Alert SCO500B. It is simply too expensive for me to buy six Nest Protect alarms which would be close to $700. I think that buying four of these units and two Nest Protect units, I can get a good smoke/CO alarm system at a reasonable price. In the future, if I decide that I want to connect these alarms with my Ring Alarm system, I will purchase a Ring Listener which is designed to be installed near and alarm and will send an alert to the Ring alarm monitoring company. I am still worried about connecting my Ring Alarm with smoke/CO detectors. The reason is that if there is any type of alarm sent, even false ones, Ring monitoring will send out the local fire department and they cannot be recalled. In my city, false alarms will get fined at increasing amounts and your alarm license can be banned for too many false alarms. I think that the First Alert SCO500B is a good smoke/CO alarm and I would recommend this model. Realize though that all smoke alarms are now designed to have a seven year life span. So know that in seven years all these units will have to be replaced with new ones. ### ⭐⭐⭐⭐⭐ Working well. *by S***N on August 6, 2026* Easy to install. ### ⭐⭐⭐⭐ These 4 essential features are hard to find in other alarms (programming tip included) *by D***B on November 21, 2020* 1. Operates as a stand-alone device. This is a must! It does not need the internet or unreliable remote servers like Alexa or Ring. No more WiFi or server connection problems. 2. Communicates using Zigbee modems integrated into each device. This allows a mesh network with other units so each unit monitors all the others. You can add more units to protect many separate locations, potentially over long distances.* 3. Wireless. Two AA batteries last longer than 9v, and are cheaper than 10 year LiPo batteries. 4. Photoelectric smoke detection, instead of ionization type. (Prefer a unit with both types but found none) * The user manual has an error in the programming instructions. Step 2 says "press and hold the test button..." It should say "Press the test button and release when the voice commands start." Otherwise these are very easy to program. ## Frequently Bought Together - First Alert Battery Powered SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location - First Alert SM500V, Interconnect Battery-Operated Smoke Alarm with Voice Alerts, 1-Pack --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/17257614-first-alert-battery-powered-sco500b-wireless-interconnected-photoelectric-smoke-carbon](https://www.desertcart.gr/products/17257614-first-alert-battery-powered-sco500b-wireless-interconnected-photoelectric-smoke-carbon) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-08-14*