Great company!! I purchased two CO detectors for my two aircraft. Life ssaving products that perform as described. This company also offered a "group buy" for our type club allowing more pilots to acquire these detectors. Prices are reasonable.

Does exactly as advertised with fast detection times and a long lasting battery that I haven't had to replace yet after 3 months of ownership. The speaker is plenty loud and it was easy to install and came with a sticky mounting bracket. It's small do you can pretty much put it anywhere. 10/10 product.

I use this in my shop because when it’s cold weather I heat the area with a propane space heater and I was concerned about combustion fumes. The sensor works and it works fast. The other day I fired up my scooter to run down and check the mail. It was only running in the shop for a minute or two at the most. The sensor almost immediately showed levels of Co. When I returned 5,minutes later the gas had dissipated. Just as advertised it held the highest recorded level in memory. I'm very pleased with my purchase and have piece of mind about heating my shop. I also burn a wood-stove to heat my house and sometimes drive a 40 year old Toyota pickup. Now I can rest assured those environments are safe too.I’m retired now, I don’t fly anymore but if I did, this would go with me on every flight.It’s small and fits in the palm of my hand but the case is sturdy. It’s designed to go anywhere and that’s exactly what I needed.It’s powered by two 2032 coun cell 3v lithium batteries. I’ve run it steady for the past month and the battery level indicator shows 90%. Highly recommend and a valuable investment imo.

funktioniert und warnt zuverlässig

Adecuado tamaño. El precio y tener que pagar 20 euros de IVA

Wanted one for flying, had bought household type before, but very loud, large and cumbersome.Purchased another, not reliable,This one is small, well made, easy to use and can hang from a lanyard. Uses normal batteries so not U/S when it runs out of power.Very rapid delivery from USA.I will get another when this one dies.

お店の方には多くの問い合わせに迅速にご対応頂き、とても親切にして頂きました。どうしても欲しかった商品でしたので助かりました。商品自体はまだ反応に至ってないので、信じるしかありませんけれど…

This alarm definitely works, when I first start my New Swift with the door open it really spikes, until the car warms up. I keep the doors and windows closed while starting now, and open them after moving off so any trapped can escape. It has gone off in Hotels(could also smell gas). The reading and alarm sound is clear. It is SO fast to react that as soon as a window opens the level lowers. It shows the max reading since on, and provides clear evidence.Only downside is the lack of extra mounts/spare sticky tape.It is fairy tough. It has been dropped twice onto hard ground, and it still seems to read correctly when appropriate, dropping immediately when a window is open.Buy this, it is a must for any car or hotel. E. T. C. It could save your life. Hire cars and boats especially.

***Update Jan 2023***I have two of these that I have had for a few years. They are usually inside the house or my purse and always read 0. It has been very cold where I live so I have been starting my car every day even if I'm not going out. I decided to put my monitors in the car while it was running just to check out the car's interior air. I had lightly pulled the door closed when I started the car but it was not fully closed. Once the car started I got out and went inside the house. A little while later I came out to turn off the car and check the monitors. The one in the front / driver's seat had 8. I realized that when I started the car and the door wasn't completely closed I did get a small whiff of exhaust. Not only did the monitor work, mine must be really sensitive (good). For the next several days I did the same test only I made sure to completely secure the car door before starting up the engine. The carbon monoxide monitors have both read zero since then. Just my personal experience.***Update***After posting my review I was contacted by Forensics (seller) they notified me that their return policy is actually a year, not the 90 days on the amazon profile. A battery change didn't fully resolve the problem with the unit. The seller replaced it quickly and at no charge. It will be a few months before I need to change the batteries in the new unit, it will be awhile before I can review that. However, based on the seller's actions and their willingness to stand behind their product I have updated my review. If the second unit continues to work after a battery change I would rate the product and the seller 5 stars, for now 4 stars. I would feel confident purchasing other items from this seller.I bought this on 9/30/18 and it came quickly with Prime. Yesterday I noticed that the battery level was very low and today the screen was off. I bought a new battery and put it in. Then recalibrated the unit. Normally I have it in my car but after putting in the battery I left it sitting on a table in the living room. About five hours later (we were in bed) the alarm started to sound. I got up and the unit was registering readings from 12-26. There is another monitor plugged into an outlet in the same room, it’s reading was zero. I have an additional unit plugged in in the bedroom also reading zero.I don’t know why this unit began alarming and I couldn’t get it to stop. I ended up taking out the battery. It is very stressful to have an alarm going off like that. Since the other two were holding steady at a zero reading (different brand) I tried to relax.We are in Arizona and the weather is mild (Feb 1st) so the heater has not been on at all today or tonight, all appliances are electric. The only other gas is the water heater out in the garage. The unit was in the living room when all people were in the bedroom, no one around it.Monitoring carbon monoxide is a big deal and I would hope that products designed to do that would be tested rigorously for dependability. Very disappointed in this.The return window for this was 30 days and the support/customer service window expired on 12/30/18 only 90 days from purchase. For such an important piece of equipment and for $100 I expected it to last longer than 4 months.

I received this product today. It is wonderfully small, just 1.75" x 2.5" x 5/8". I am intrigued by its size and high-quality construction, and after reading the positive reviews here on Amazon, I think this little unit will probably work great for detecting CO in my car. It is very easy to use, with only one button and a nice feature set for detecting CO in a vehicle, and works right away out of the box. No muss or fuss.NOTE: This product is not designed for use in a home. Home units have higher CO thresholds (to avoid too many alarms) and much louder alarms so they can be heard at a distance. This detector is specifically designed for use in a small space like a vehicle.The detector I received came in a very small box measuring just 2.25" x 3.25" x 1", and included a very tiny one-sided sheet of instructions measuring 4" x 5.5" (attached to this review). I saw a YouTube review of this product (https://youtu.be/ffGV4ORnq8U) from Dec. 2017 that shows the exact same product in a much larger box than I received, with multiple, full-size pages of instructions, but I like the small box (save trees!) and the tiny instruction sheet I received seems to cover the required information. Weirdly, the manufacturer does not seem to have a web site (!), so all the available product information is simply on the small instructions sheet, the Q&A and reviews here on Amazon (and elsewhere?), and the one YouTube review I found (above). So, in case it is useful to someone, below I have collected all the info I've found on this product:1. This detector comes with a convenient plastic clip with a peel-off 3M stick-on mount for attaching to a surface in your vehicle (if you want to attach it). It is slightly tricky to remove the detector from the plastic clip mount the first time you try it, but it gets easier with practice. Also you don't need to remove the detector from the clip mount very often because the battery lasts a long time (see below), unless you are tracking down an active CO leak and you need to keep resetting the max CO level reading (see below).2. The instructions say don't put the detector in direct sunlight, because it will not work correctly at temperatures above 122F. Above that temperature the unit will display "---" until the temperature drops below 122F.3. You can use the detector right out of the box. The battery is installed and ready to roll.4. To turn on the unit, hold the power button for 3 seconds. The display will read "CAL" (meaning "calibration") for 3 minutes, it will make a short beep to indicate that warm-up calibration is complete, and then it will show the CO reading (which will normally be 0). To turn it off, hold the power button again for 3 seconds until the display goes blank. If you turn it back on again, you will see the "CAL" message again for 3 minutes.5. The detector is designed so that you can leave it "on" all the time, unless you want to clear the maximum CO reading (see below). The instructions say it will run 8-12 months on the included battery, and then you can change batteries. By the way, it uses a common CR2032 button battery, very easy to find in the drugstore or whatever (the specific type of battery is not mentioned in the instructions). When the battery is getting low, the instructions say the unit will "beep beep" every 30 seconds.6. The detector displays a continuous CO reading that you can glance at any time.7. If the detector has a continuous CO reading of at least 9ppm for at least 60 seconds, the red LED light will start blinking, and you can always read the actual CO level on the detector display.8. If the detector has a continuous CO reading of at least 25ppm for at least 60 seconds, the buzzer will sound in addition to the blinking red LED. (I don't know if the buzzer is an intermittent beep or a continuous buzzer sound, but multiple reviews here have reported that the buzzer definitely gets your attention.)9. The tiny instruction sheet (attached) says in the introduction that this detector has a third alarm mode that goes off when levels exceed 50ppm for an extended period, but there is no mention of this third alarm mode in the rest of the instructions or in the feature list here on Amazon. I don't know if there actually is a third alarm mode, or if that info was put in the instructions by mistake, but in any case, the 25ppm alarm will of course cover the 50ppm case as well.10. To view the maximum CO reading since the last time the unit was reset, press and release the power button briefly, at which point the blue "MAX" LED will come on and the maximum CO level detected will appear on the display for 5 seconds, before it resumes normal operation. You can repeat this as often as you want. The act of reading the maximum CO level does NOT reset the max level reading back to zero; it is still recorded inside the unit.11. If you want to clear the maximum CO reading, to set it back to zero, you have to turn off the detector, turn it back on again, and wait 3 minutes for the "CAL" message to finish and the unit to beep (see above). This reset process is a little inconvenient if you are trying to do multiple tests to see if a CO leak has been fixed. But that situation hopefully won't come up for you very often.12. All CO detectors have an "end-of-life" date, after which the detector needs to be serviced at the factory or discarded and replaced, because it will no longer give reliable CO readings. This limitation is inherent in the technology of CO sensors. This detector is no exception. The unit I received in June 2018 has a sticker on the back that say the end-of-life is Jan 2021, which is 2.5 years from now. There is no mention in the instructions, or anywhere on the Internet that I've found, that says what happens when this particular detector reaches its end-of-life. I assume that it keeps behaving normally, except that you can't completely trust it's CO readings, which is slightly worrisome. Another reviewer here on Amazon mentioned this same concern. Also, some CO detectors have a way to mail the detector back to the company when it reaches end-of-life to have a new CO sensor installed and tested at a lower cost than simply replacing the unit, but there is no mention of that service for this detector. I'm just going to have to somehow remember to discard this CO detector after Jan 2021. Here is my feature request for the next version of this detector: At end-of-life, display "EOF" on the display and do a "beep beep" every 30 seconds, so that the purchaser knows that the detector is no longer reliable and should be replaced.That's it. I'm expecting this CO detector will be very useful in my car.