Kidde Carbon Monoxide Detector, Propane, Natural, Methane, & Explosive Gas Alarm, Plug-In Wall with 9-Volt Battery Backup, Digital LED Display

I'm about to wax poetic about the "Safety Siren Pro Series 1000" (or whatever demonic device this is). Let's be clear, this thing detects carbon monoxide like a bloodhound sniffs out a dropped hotdog at a picnic. No complaints there. If there's a rogue molecule of CO within a five-mile radius, this thing will know. It's like having a tiny, hyper-vigilant, gas-detecting chihuahua with a PhD in atmospheric chemistry.But, and this is a BIG but, when those batteries start to wane, oh. sweet merciful heavens... it's like a tiny, metal-clad demon has taken up residence in my home. The beeping... the BEEPING... isn't your standard, "Oh, batteries are low, please replace me" chirp. No, this is a sustained, high-pitched, soul-rending wail that sounds like a chorus of dying smoke detectors harmonizing with a dentist's drill.It starts subtly, a little "beep" here, a little "beep" there. You think, "Oh, I'll change them tomorrow." WRONG. You've just signed a pact with auditory torment. Within hours, it evolves into a relentless, rhythmic pulse of pure, unadulterated annoyance. My cat now hides under the sofa, my plants have visibly wilted, and I've started having flashbacks to that scene in Reefer Madness where the guy leaps out the window, convinced he's being chased by jazz demons.I swear, this thing is less a safety device and more a psychological warfare instrument. It's so effective at alerting you to low batteries that you'll replace them out of sheer, unbridled terror. You'll be sprinting to the store, batteries clutched in your trembling hands, like you're carrying the antidote to the apocalypse.Five stars for gas detection, minus a million for auditory assault. If you value your sanity, buy this thing, but keep a fresh pack of batteries on standby, and maybe invest in some industrial-grade earplugs. You've been warned.

Good: The perfect alarm for a detached garage. Detects smoke, CO, natural gas AND propane, with a display on the front that shows levels of same even when they're too low to trigger the alarm. Alarm is loud enough to hear in the house, eight feet away. Plugs directly into an outlet, or you can detach the power supply and mount the alarm away from the outlet. Pricey, but you get a lot for that price.Bad: Not the most stylish unit. But, in the garage, who cares? At this price point, would have preferred a 10-year lithium backup battery in place of a 9-volt.Bottom line: This is the second unit of this type I've owned, the first reaching end of life after 10 years (CO alarms wear out eventually) and cheeping nonstop to announce same. I tested this one, briefly, with my lawn mower running in a closed garage (with me outside a cracked side door, just in case.) It did indeed start reporting CO levels at around 40 ppm, which steadily climbed until the alarm sounded at about 100 ppm. (Whereupon I held my breath, quickly went in, shut down the mower, opened the big door, went back out and waited until the CO level became too low to measure.) The only additional function I wish it had is a remote link, wifi or whatever, to notify me when I'm unable to hear the alarm. No complaints otherwise. Five stars.

We had some issues with a seldom used drain expelling sewer gasses into our house. I like that this one plugs in so no dead batteries. I also like that it has a numeric readout so we can see the level in the room and be confident that it's working.

The unit works very well and is quite sturdy and simple to use. However I had to resort to you tube videos to get ideas how to get the battery cover off... If you are like me with only moderate hand strength use a sturdy screwdriver to help get battery cover to move. Was NOT easy even with the driver. This should be addressed by manufacturer. Plenty of people complaining about this issue.

I could not find these locally. They work and test well on the unit. I’ve had them for years and needed a replacement. Plug in easy installation. They have never been tested in an actual detection as it is a bit easier to “live test” a smoke alarm but, I don’t have a wired system and this makes me feel more secure.

The Kidde Carbon Monoxide and Explosive Gas Detector is an absolute must-have for every household. Safety is non-negotiable, and this device provides peace of mind like no other.Right out of the box, setup is a breeze—just plug it in, and you’re protected. The digital display is clear and easy to read, providing real-time updates on CO and gas levels. What truly sets this apart is the dual detection for both carbon monoxide and explosive gases, ensuring comprehensive coverage in one compact device.During testing (using safe methods), the alarm proved to be both sensitive and reliable. The loud, piercing sound is impossible to miss, making it effective in alerting you and your family in case of danger. It’s reassuring to know this device is constantly monitoring, even while we sleep.I also appreciate the sleek, unobtrusive design—it blends seamlessly into any room while remaining highly functional. With Kidde’s reputation for quality and reliability, I feel confident that this detector is working around the clock to protect my home and loved ones.Safety, simplicity, and top-notch performance—this detector delivers it all. Don’t wait until it’s too late—invest in this lifesaver today. Highly recommended for every home, apartment, or office!

Easy set up and use.