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Description
Plug-In 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm with Battery BackupThe USI Electric MCN400 Plug In Carbon Monoxide and Natural Gas Smart Alarm is a 2 in 1 device that provides double the protection with a single installation. This dual sensing alarm protects against two deadly household threats: carbon monoxide and natural gas (or methane). Perfect for new or replacement installations, the 120 volt AC alarm is suitable for houses, apartments and mobile homes. The compact plug in design covers only (1) outlet for a
The USI Electric MCN400 Plug-In Carbon Monoxide and Natural Gas Smart Alarm is a 2-in-1 device that provides double the protection with a single installation. This dual-sensing alarm protects against two deadly household threats: carbon monoxide and natural gas (or methane). Perfect for new or replacement installations, the 120-volt AC alarm is suitable for houses, apartments and mobile homes. The compact plug-in design covers only (1) outlet for a fast and easy installation with no wiring required. This alarm features microprocessor intelligence to eliminate nuisance alarms, a single silence/test button to quiet a non-hazardous alarm and an end-of-service life warning that sounds when it's time to replace the battery (approximately 7 years from activation). Three LED colors display the status of the alarm, power, CO and gas in your home. The 9-volt alkaline battery (included) continues protection in the event of a power outage. This alarm is ETL Listed to UL2034 and UL1484 Standards, California State Fire Marshal approved and Federal Housing Authority (FHA) approved to exceed industry standards. For maximum protection, install an alarm inside every bedroom, outside every sleeping area and on all levels of the dwelling. The USI Electric MCN400 Plug-In Carbon Monoxide and Natural Gas Smart Alarm comes with a 5 year limited warranty. Universal Security Instruments is a U.S. based manufacturer of high quality, easy-to-install home safety products. Founded in 1969, Universal Security Instruments has nearly 50 years of heritage in providing home safety products for families. With state-of-the-art manufacturing facilities, Universal Security Instruments continues to launch revolutionary new products and technologies with the mission of always working to keep families protected.
- 2-in-1 alarm that provides double the protection with a single installation to protect against carbon monoxide and natural gas
- 120-volt AC alarm with backup battery is suitable for houses, apartments and mobile homes
- Three LED colors display the status of the alarm, power, CO and gas in your home
- Compact plug-in design covers only (1) outlet for a fast and easy installation with no wiring required
- Comes with a 5 year limited warranty
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Convenient and easy
Flavor Name: Mint, Size: 3.5 Ounce (Pack of 1)
Easy to use. Fresh breath lasts a while. will be buying again
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Reviewed in the United States on May 30, 2026
★★★★★ 5
A Fluoride‑Free Toothpaste the Whole Family Honestly Loves
Size: 4 Ounce (Pack of 3), Set name: E. Orange Cream, Watermelon Mint, Strawberry Mango
We’ve been using Boka Fluoride Free Toothpaste with Nano‑Hydroxyapatite for a while now, and it has easily become a staple in our household. Finding a toothpaste that is both clean and effective and something my daughter actually enjoys using has always been a challenge, but this one truly checks every box.
First, the flavors deserve special mention. We’ve tried Orange Cream and Watermelon Mint, and my daughter absolutely loves both. There’s no struggle at brushing time anymore, no complaints, no resistance. She actually looks forward to brushing her teeth, which as any parent knows, is a huge win. The flavors are fun but not overpowering, and they don’t have that harsh or medicinal taste found in many toothpastes, especially “kid-friendly” ones.
From a parent’s perspective, what really sold us is the fact that Boka is fluoride‑free and made with clean ingredients. We love knowing that we’re not exposing her to unnecessary chemicals while still supporting good oral hygiene. The inclusion of nano‑hydroxyapatite gives us peace of mind as well, it feels like a modern, thoughtful alternative that aligns with what we want for our family. The toothpaste feels gentle, non‑gritty, and leaves mouths feeling smooth and clean without dryness or irritation.
The texture is another pleasant surprise. It’s creamy and smooth, easy to spread on the toothbrush, and doesn’t foam excessively. Both flavors leave a fresh, clean feeling afterward without any lingering bitterness. Even as adults, we genuinely enjoy using it, which says a lot, we often find ourselves reaching for it instead of our usual toothpaste.
Overall, Boka Toothpaste has made brushing easier, more enjoyable, and more reassuring for our family. My daughter loves every flavor we’ve tried, and we love knowing we’re using a product that’s clean and fluoride‑free without compromising quality. If you’re looking for a toothpaste that works for both kids and adults and one that finally ends brushing battles,, I can’t recommend this one enough.
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Reviewed in the United States on April 23, 2026
★★★★★ 5
Toddler Approved!
Size: 4 Ounce (Pack of 1), Set name: A. Strawberry Mango
I never thought I’d describe toothpaste as “fun,” but here we are... I bought this Boka strawberry mango flavor for my toddler — I figured he would enjoy this over a mint flavor because what kid enjoys a harsh, burning feeling? It smells fruity and tastes like a smoothie. We are still practicing brushing but this toothpaste helps encourage the importance of daily teeth maintenance. Also, I love that it’s fluoride-free and I am not worried if it's swallowed. It is pricier than I would prefer, but it has lasted so long that I've came to terms that it's worth the cost.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Made in America nano-hydroxyapatite Toothpaste that's Well Worth Buying.
Size: 4 Ounce (Pack of 3), Set name: E. Orange Cream, Watermelon Mint, Strawberry Mango
This review is pretty much the same as the one I wrote for the Boka Coco Ginger.
Boka Toothpaste is just that good.
I've been using the Japanese brand Apagard Premio toothpaste for a couple of years now and recently I noticed this Boka toothpaste while looking for alternatives that wold be less costly. I've been using this toothpaste since the end of May, 2025. I wish they would sell it in larger tubes.
Boka Toothpaste is very mild and makes brushing your teeth better. It doesn't have that harsh mint flavor which with most toothpastes feels like it's burning your mouth. It comes in multiple flavors and when you're done brushing your teeth, there is no need to rinse your mouth as it is a safe toothpaste to use.
After having used it for a few days, I decided that I will keep using the Boka brand from now on.
I just wish that most stores would carry this toothpaste instead pf selling all those major brands which are full of fluoride.
Did a bit of research and found that Boka Toothpaste has the same percentage of nano-hydroxyapatite as Apagard Premio which is 10%. So that means that Boka Toothpaste is just as good if not better.
No Fluoride
No Harsh burning Mint Flavor
Safe to shallow
Multiple flavors
10% nano-hydroxyapatite
Keeps your teeth Strong
And one thing I've noticed is nano-hydroxyapatite makes your teeth less sensitive by rebuilding your tooth enamel
I ordered four flavors, Watermelon Mint, Strawberry Mango, Orange Cream and Coco Ginger.
So far, I've tried the Coco Ginger and I was surprised at how mild it was and it didn't have the sharp taste that ginger usually has. It is good and I enjoy it. I also tried the Orange Cream which was good. I'm looking forward to trying the other flavors. The Orange Cream I'm sure my wife will like if I can get her to try it. But she can be very stubborn at times.
I see there are some other flavors which I intend to try such as the Cinnamint, Cucumber Dill, Lemon Lavender and Strawberry Basil. Not sure if I should try the Ela Mint as I don't know how strong or mild the mint will be.
I'm sure that if places such as Walmart brick & mortar stores sold this toothpaste, that it would sell really well.
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Reviewed in the United States on June 24, 2025
★★★★★ 5
Favorite toddler toothpaste
Size: 4 Ounce (Pack of 1), Set name: A. Strawberry Mango
I bought this for my 18month old who has all his teeth already. It works great. The smell is pleasant, the taste isn’t harsh, and the texture isn’t as thick as most toothpastes - perfect for a toddler. I’ve been using this for a couple of months now and have not noticed any irritation. He enjoys it about as much as any 18 month will, ha! It’s just as effective as fluorinated toothpaste. You get what you pay for. It’s a big tube!
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Reviewed in the United States on May 18, 2026
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