DS-399 Portable Carbon Monoxide Detector, 168H Standby, Rechargeable 3-in-1 CO Detector with Audible & Visual Alerts for Travel & Camping, CO Meter for Home, Car & Tent

This is a nice little unit! I use it in my canvas hot tent to be safe with my wood burning stove. The thermometer is accurate and a fun addition for recording how ridiculously hot my tent gets and how cold when the stove goes out. The gentle lights come on even when you just bump it. Handy for night time reading. It’s alarm went off once when I accidentally allowed a large influx off wood smoke. It’s loud and effective. I have watched it measure lesser amounts of smoke and carbon monoxide. It seems both sensitive and precise. It holds a charge for a long time even in severe cold. All in all a much higher quality device than I was expecting. Highly recommended!

We bought this in advance of an international trip. We know someone whose child died asleep in a hotel while traveling due to carbon monoxide poisoning. I tried it next to the gas stove (natural gas) and over a lit match with no response. I tested it near the car exhaust and it went off right away. I am grateful that such an inexpensive monitor will provide an extra layer of safety when traveling outside the US. Im able to charge it using my phone charger (it came with its own cord, but I love that its easy to charge with an existing cord).

Most accurate CO2 meter I’ve found so far, and highly portable and easy to charge. It turns out CO2 levels have real effects on people, in homes, offices, classrooms, and vehicles. Lots of studies have shown this. As a society, we’ve done a great job of making more of these spaces energy efficient. But often, it's done at the expense of fresh air, which our bodies and brains genuinely need. Studies have found that different ranges of CO2 have measurable impacts on human performance, even in schools, driving, offices, everywhere. This device helps with knowing when to open windows (and when it’s okay to close them again), even if you’ve been trained to ignore your body’s cravings for fresh air (as school, work, and high utility bills have trained many of us to do).

Worked well in our tent will use it from now on

Holds its charge for a very long time (like an entire vacation) and is easy to read. I got this after reading way too many news stories about vacationers dying in hotels due to faulty carbon monoxide detectors and I think it is absolutely crucial to take your own safety into your hands in this regard especially. I bring this whenever I travel and keep it out on the table or dresser (next to other things I know I won't accidentally leave behind) and I have so much peace of mind. I will be ordering more of these for my family members as well.

The detector shrieks its alarm every time we use the toaster, light a candle, or even take a hot shower. It's overly sensitive to everything except a real leak, creating panic and complacency.

Have this in an enclosed trailer with gas air compressor works great. Had a battery operated one and the battery would always die in cold weather, this one last all day in cold weather. Easy to use.

Works well. Battery last days. Worth the money!

Great little product. It works perfectly, holds a long battery life didn’t need to recharge until the 5th time using for long consecutive periods. Gives peace of mind while travelling! I really love having this even as a back up to keep my family safe.

Funktioniert perfekt und Qualität und Preis passen super

Parece que va bien, la temperatura la clava y la humedad también concuerda con la aplicación del tiempo del móvil. El sensor de co parece que funciona también, lo probé con el butano y se subió a 250. Tardo en registrar este valor unos 30 segundos y se puso a pitar como un loco. Luego le costaba bajar aún habiéndole alejado del gas. Mientras bajaba pitaba constantemente pero bueno lo importante es que sí que funciona. Estoy satisfecho con el producto de momento.

Feels really well made, and seems to work ok, with the added bonus of temperature and humidity levels readouts. Recommended. Thank you.

Semplice e funzionale. Testato nei pressi di un camino ed ha rilevato valori crescenti in avvicinamento. Comodo da piazzare ( sempre nel punto più basso dove soggiorniamo. La Batteria è durata per 9 giorni ( aveva ancora una tacca evidenziata sulle 3 disponibili. Arrivato nei tempi previsti.