--- product_id: 273939691 title: "SA511CN2-3ST Wireless Interconnected Smoke Alarm with Voice Location, Battery Operated, 2 Pack, WHITE" brand: "first alert" price: "Β₯24229" currency: JPY in_stock: true reviews_count: 5 url: https://www.desertcart.jp/products/273939691-sa511cn2-3st-wireless-interconnected-smoke-alarm-with-voice-location-battery store_origin: JP region: Japan --- # Wireless Interconnect 85dB Siren Battery Operated SA511CN2-3ST Wireless Interconnected Smoke Alarm with Voice Location, Battery Operated, 2 Pack, WHITE **Brand:** first alert **Price:** Β₯24229 **Availability:** βœ… In Stock ## Summary > πŸ”’ Stay Safe, Stay Smart! ## Quick Answers - **What is this?** SA511CN2-3ST Wireless Interconnected Smoke Alarm with Voice Location, Battery Operated, 2 Pack, WHITE by first alert - **How much does it cost?** Β₯24229 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/273939691-sa511cn2-3st-wireless-interconnected-smoke-alarm-with-voice-location-battery) ## 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€’ **Trusted Brand:** First Alert: A legacy of safety since 1958. - β€’ **Safety Network:** Create a home safety network with interconnected alarms. - β€’ **Smart Detection:** Photoelectric sensor minimizes false alarms while detecting smoldering fires. - β€’ **Easy Installation:** No rewiring needed; battery-powered for hassle-free setup. - β€’ **Voice Location Alerts:** Voice alerts with 11 programmable locations for precise danger identification. ## Overview The First Alert SA511CN2-3ST Wireless Interconnected Smoke Alarm is a battery-operated safety device that interconnects with other alarms, providing a comprehensive home safety network. With voice alerts indicating the location of danger, an 85-decibel siren, and a photoelectric sensor to reduce false alarms, this product ensures your family's safety. Easy to install and trusted since 1958, it’s the perfect addition to any modern home. ## Description FIRST ALERT SA511CN2-3ST Wireless Interconnected Smoke Alarm with Voice Location, Battery Operated, 2 Pack, WHITE ## Features - Help keep your family safe with these battery operated smoke alarms that wirelessly interconnect with each other and other First Alert enabled alarms so that all sound when one is activated, creating a home safety network; comes in a pack of 2 alarms - Voice alarm with 11 programmable locations tells you where the danger is so you can choose the best evacuation route; Loud, 85-decibel siren sounds to alert you to danger - Equipped with photoelectric smoke sensor optimized to detect larger smoke particles produced by smoldering fires; Helps minimize the number of false alarms - Battery powered alarm requires no rewiring for installation and provides continued monitoring even if there's a power failure; use with Polaroid AA batteries for best results - Wirelessly connect upto 18 first alert enabled alarms for the maximum in whole home protection; includes test/silence button, low battery warning, end of life timer.First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018) ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | First Alert | | Style | Standard Detection | | Power Source | Battery Powered | | Color | WHITE | | Product Dimensions | 2"D x 5"W x 5"H | | Alarm | Audible | | Sensor Type | Photoelectric | | Global Trade Identification Number | 00029054002860 | | Number of Items | 2 | | Manufacturer | First Alert | | UPC | 029054002860 | | Part Number | SA511CN2-3ST | | Item Weight | 1.39 pounds | | Item model number | SA511CN2-3ST | | Batteries | 2 AA batteries required. (included) | | Is Discontinued By Manufacturer | No | | Size | 2-Pack | | Pattern | SA511CN2-3ST | | Item Package Quantity | 1 | | Number Of Pieces | 1 | | Included Components | 2 First Alert SA511CN2-3ST Interconnected Wireless Smoke Alarms with Voice Location, Battery Operated, 2 Mounting Brackets | | Batteries Included? | Yes | | Batteries Required? | Yes | | Battery Cell Type | Alkaline | | Description Pile | AA | | Warranty Description | 10 year | ## Product Details - **Brand:** First Alert - **Style:** Standard Detection - **Power Source:** Battery Powered - **Color:** WHITE - **Product Dimensions:** 2"D x 5"W x 5"H - **Alarm:** Audible - **Sensor Type:** Photoelectric - **Global Trade Identification Number:** 00029054002860 - **Number of Items:** 2 - **Manufacturer:** First Alert ## Images ![SA511CN2-3ST Wireless Interconnected Smoke Alarm with Voice Location, Battery Operated, 2 Pack, WHITE - Image 1](https://m.media-amazon.com/images/I/71jroyX8kpL.jpg) ## Questions & Answers **Q: If i buy three of these double packs will they all connect?** A: They should, I have 4 units and was able to get them all connected. It took me a few times at the beginning because I was not fast enough. **Q: I already have 3 hardwired detectors with no interconnect. I can just replace with these and they will connect right? Prefer hardwired to battery.** A: The SA521CN replaces one hard wired unit to provide the wireless connection for add-on wireless units such as the SA500. Example: My alarm system had three hard wired units. Replaced one with the 521. I then added four more units to the system wirelessly with SA500 units. Now have seven interconnected detectors in all without running any additional wires. **Q: Will this smoke alarm work if you connect it to your wired home smoke alarm system? If one alarm in your system goes off will this one be alerted?** A: The BRK wireless smoke detector also has the hard-wire connections to interface with both wired and wireless models. Once installed, two wireless units connected everything together with my non-wireless BRK SC7010Bs in adjacent structures. It was a great solution for my detached garage. With the exception of being wireless, they function in the system like the other BRK models. (Note: Use only compatible models of the same brand) One can call First Alert to check on the compatibility of their various models. **Q: Is this device z-wave compatible?** A: No it is not. Lowes sells some that are z wave compatible. They are called ZSMOKE and ZCOMBO. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very pleased so far *by I***I on Reviewed in the United States on 11 January 2018* First Alert SA511CN2-3ST Interconnected Wireless Smoke Alarm with Voice Location, Battery Operated, Pack of TwoWe paid $70 per pair from Amazon on Jan 4, 2018. We bought 3 sets for a total of 6 detectors. They arrived on Jan 7 and I just finished installing them tonight. So far, I am very impressed with these smoke detectors. I wanted to provide a review to share my experience with you.Before deciding on these, I read some smoke detector reviews for several different brands and models and choose these for the wireless communication features and the price. I also watched some YouTube videos and Amazon reviews on this particular alarm system.Let me start with a list of PROs and Cons.PROs:1] Easy to program and install (once you read the instructions carefully).2] Intelligent design … smart latching mechanism and mesh Wi-Fi network technology.3] Nice and loud, good if you are a deep sleeper or have TV or music turned up loud.4] If one of the detectors alarms, they all alarm and tell you where the potential threat is.5] Affordable price at $35 a pop.6] Battery enclosure is accessible without having to un-mount the detector from its base.CONs:1] The wall anchors are too small for my taste, so I used the kind I like instead.2] The range is only about 50 feet from one to the next.3] Maybe too loud for some people, when they all go off in your house at once, it sounds intense.4] It will not connect to your home Wi-Fi or network; therefore you cannot get a notification to your phone, tablet, laptop, etc. via an app.Here are some tips to help you program and link them.Programming and linking are two separate procedures. All programming does is assign a built in name for each specific unit. Linking them allows them to communicate with each other. You don't have to program them or link them, in which case they would just act like a $10 standalone smoke detector.What I did is put batteries in all 6 detectors and assigned a different name to each one. To do this,1] Open the battery compartment put in the two AA batteries, paying attention to polarity.2] Close the compartment door and you should hear a brief chirp followed by this message:"Welcome. First Alert smoke alarm, no location programed. To change location press and hold test button now. Press and hold test button to test the unit."3] After the message says "...test button now." and before the message is over, press the test button for two seconds. If you miss this, start over by opening the battery compartment, wait a few seconds, then close the battery compartment and try again.4] Once you get that right, the unit will continuously cycle through all the names you can choose from.Basement -> Childs Bedroom -> Dining Room -> Family Room -> Guest Bedroom -> Hallway -> Kitchen ->Living Room -> Master Bedroom -> Office -> Utility Room -> No Location -> (Then back to Basement – repeat)5] When you hear the location you want to assign the unit, push and hold the test button for one second just after the location you want to choose is announced and just before the next location is announced.6] Mark each unit with a tiny post it note, sticker, piece of tape with writing for the name you assigned.Now you are done programming that unit and the assignment will remain even if you replace the batteries. Linking them is easier, especially if you have them all in front of you on a table, bed, couch, or floor.1] Open all the battery compartments except one which I will call unit 1.2] Press and hold the test button on unit 2 first, and then close the battery compartment for unit 2.3] When you hear unit 2 chirp, release the button on unit 2.4] The power indicator on unit 2 will have a fast flashing green light indicating communication.5] Put unit 2 face down on a cushion or pillow (so it won’t be so loud) and pick up unit 1.6] Press and hold the test button on unit 1.7] When unit 2 chirps, you can let go of the test button on unit 1.Note: If you wait more than two minutes between steps 5 and 6, you may need to start over at step 1.Unit 2 is now linked. Repeat these steps for the unit 3, unit 4, and so on. It does not matter in what order you link them because they use a mesh network to communicate. They should remain linked even if you replace the batteries.If my instructions fail, try using the procedure in the manual.What appeals to me about this alarm system is that it seems wonderful for a large house or a house or apartment with a basement, garage, and/or storage shed ... or a situation where a fire could start in one area but you might not be able to easily hear the alarm from a different location in your house, condo, or apartment.I would suggest that the bigger your house, the more you buy. The main reason for this you want to situate each detector in such a way that no two are separated by a distance of more than 50 feet apart. Also you need to consider the line of sight path from one unit to the next closest. Is it a clear shot? Does the signal have to pass through multiple walls? Are the walls drywall, brick, or concrete? Are the walls zig zagged at angles or a nice clear perpendicular path?Something else comes to mind. Make sure you are using good quality batteries, like Duracell, and check the expiry date on them. Also, if you put one in the Kitchen, consider mounting it on the wall away from the stove so you can reach the test button without having to stand on a stepping stool. That test button also acts as a way to mute the system in the event of a non-serious situation like burning a roast in the oven. You can squelch the system for 10 minutes to stop the panic of a full out serious alarm condition while you clear the smoke out.I plan on doing a follow up concerning my personal experience with this system as it pertains to:1] False alarms.2] Battery life.3] How satisfied I am with the system over time.For now, I give it a full 5 stars.I hope you enjoyed my review and I hope it helps you in some way.Update 1:Jan 27,2018. We have had zero false alarms so far, but the system alarmed in different ways two or three timesdue to testing and I did get mixed results. On the first occasion, the smoke detector in the Utility room alarmed.That's because she was toasting some bread in the small convection oven and it got too hot and burned. I willprobably move that unit into the adjacent hallway ceiling. When I asked the boy if he heard the alarm while he wasin the pool house at that time, he said "no".The interesting part to this is that when I installed the unit in the pool house, I tested it. It worked. It worked so well,I stepped outside on the porch after triggering the test button and it sounded like an air raid. Six alarms sounding intandem, all throughout the various rooms where they were located. It was almost Orwellian.Sure enough, I performed another test and it resulted in another negative. Pool house will not respond to the other 5, butall the other five will respond to the pool house. The other 5 also respond to each other, it's just number 6 that doesn'tlisten to the others. As it turns out, I am okay with that. As long as number 6 talks to the other 5, that's really all I neededanyway. I want to know, in my bedroom hall, if the pool house detector smells smoke. The pool house already has 2 othersmoke detectors (old ones that don't communicate, they just alarm) that will warn anyone in there. At least I will also getan alarm in my hallway that tells me the "Child's Room" has detected a warning. That means "Pool House" because that's how I programmed it. I am still very pleased. ### ⭐⭐⭐⭐⭐ Great product *by C*** on Reviewed in the United States on 17 March 2024* I really like the interconnected feature. Easy to install. ### ⭐⭐⭐⭐ Great Smoke Alarms - Awful, Potentially Dangerous Directions *by N***K on Reviewed in the United States on 20 February 2022* These smoke alarms are fantastic once set up properly, creating a wireless mesh network to alert you no matter where you are in the building. Sadly, there are two things that are not clearly explained:1) You can connect more than two alarms in the network - I'm not sure of the limit, but I have 4 connected right now.2) THESE ARE NOT CONNECTED OUT OF THE BOX: this is a crucial point, and potentially a safety hazard. These alarms don't come paired from the factory, and I can only imagine how many people installed these just assuming that they will automatically communicate. Furthermore, the instructions are terrible at relaying this message and fail to describe the linking process.The steps to link alarms is pretty easy - make sure you have all alarms in front of you to make the process easier:1) Set up the alarms by inserting batteries and assigning locations - this is straight forward via vocal prompts.2) Open the battery trays of all but one unit. The unit that you don't open will technically be the master, but I'm not sure if it matters which you choose. I picked the centrally most located alarm to be the master.3) One by one, hold the test button down followed by closing the battery door of each unit. Release the button a second or two after closing the door. You should hear a chirp followed by a blinking green power light.4) Once all units (besides the master) have a blinking green light, push the button once on the master unit for one to two seconds. All units should then begin talking and the blinking green lights should turn off.5) Test one unit to confirm wireless connectivity. They should all beep when testing.You should be all set if this is performed correctly. I found that one unit did not want to be a base, so I had to try another before getting them all to connect. --- ## 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.jp/products/273939691-sa511cn2-3st-wireless-interconnected-smoke-alarm-with-voice-location-battery](https://www.desertcart.jp/products/273939691-sa511cn2-3st-wireless-interconnected-smoke-alarm-with-voice-location-battery) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-14*