purchased 9 of these a few years ago … one or two didn’t work right out of the package, couple smashed to bits when one car ran over them and all but one have now quit working for no apparent reason… always used lithium batteries and no battery leakage but 2 of the 4 batteries drain down and with fresh batteries… nothing. For a novelty maybe ok if you get one that works. For a reliable roadside emergency light… no way i’d waste the money again.

Al segundo día de práctica del producto dejó de funcionar, no lo recomiendo.

These flares are pretty good for the price. Tested them on the highway and they were easily visible from 1 km away and further. I think these are great for professional use. Also tested them for brightness against one Whelen mini justice bar which is stupidly bright/hard to look it. The FlareAlert shined back at me with no issues seeing it. Personally I would recommend these for traffic control over the disc type flares. The only complaint I have is that I wish there was a quick flash option. The blink, blink, pause I'm not too fond of but it works. If you are using these on the highway I would suggest running every second one as steady on in conjuction with the blink, blink, pause and get at least 8 units. Battery change I found was either super easy or super hard. Some of the unit's o-rings don't like to let go and it can take quite a lot of strength to twist them off. Not good for those with weaker wrists.The build construction is actually quite tough which can be hard to see in pictures. I don't think it is more durable than a disc flare however and would definitely scratch up pretty badly if it was run over and thrown down the road. Strong magnetic that stays on the car well. For the heck of it I even decided to test what it would take for it to come off and I was going about 110km and it didn't even move. For daytime use I would continue to carry incendiary flares. I doubt these LEDs are visible enough. You can buy little stands for these to mount them up higher on the road which may help make them more visible.

Boy, these are just great! I bought two, back in November. One for hubby's car, one for mine. I got caught on icy mountain roads shortly after mine arrived and had to call a tow truck. I had my FlareAlert in the trunk of the car and had to slip-slide my way around to fetch it and one of my hazard sticks. Well that taught me a lesson to always have it within arm's reach, so I don't necessarily have to exit the vehicle to put it to use. It's not always safe to be walking around outside. When on a freeway with a lot of traffic going by, it's best not to get out at all. And, in this case with the ice and all, the car could have started sliding backwards on the ice, while I fiddled around in the trunk, or I could have slipped and hurt myself just groping my way to the back of the car and back.The second time I used it was in March when my car's power steering pump gave out on a long drive home from Toronto. This happened on a busy freeway, at night in the dark. This time I had the FlareAlert nearby and never got out of the car. I switched it on flashing mode and stuck it on top of the car and waited for the tow truck I then called.Both times I told the tow truck drivers that I would have the flashing red light on my car. When asked if the light was easily visible, they both enthusiastically told me that they could see it from way far away and that it really helped to know to look for it. Usually they tend to have to drive more slowly, trying to locate where the distressed car is - especially at night. Both occurrences happened at night.The FlareAlert is well built of very nice, solid plastic. It releases the light very strongly and clearly. The magnet on it is so strong that I have to be careful not to store any electronics near it. Hard drives and memory cards might not react favorably in its proximity...All in all, I am really happy I got this useful gadget and pleased with the way it performs and the service it has already rendered. Everyone should have one nearby in their car. It could be a real life saver! It will definitely save your car's battery while keeping you visible if you are stranded. No need to leave your flashers on if you are concerned about draining your battery (i.e.: if you have to turn your engine off - as I had to do or my car would have overheated). I may get a second one for myself, as I recall worrying that other cars passing by may not see the outer side of my black car at night. I could reach over the passenger seat and put one outside on that side too. Even if it's only attached to the door on that side, it would still give the passing vehicles a better idea as to my car's physical whereabouts. Safer yet that way... Also am keeping some additional batteries on hand - just in case.I recommend this product highly! And I know this whole review sounds a bit like an infomercial, but I am actually in no way affiliated with either the product manufacturers, distributors, or vendors. I just really feel enthusiastic about the usefulness of the product, having had the (unfortunate) occasion to put it to use twice now. Hope you all stay safe - with or without it. :)

Had this hockey puck for 3 months. I used it ONCE to test. The rest of the 3 months it has sat in the center console of my car. Needed it today and it did not work. Contacted the company. Told to replace the batteries as they were most likely drained. What?!! From three months of sitting there, the batteries are "most likely drained"??? Unfortunately that wasn't the problem. Now it's a paperweight. Don't waste your money and certainly DON'T count on it to, oh you know, save your life in an emergency!!!UPDATE: The manufacturer's customer service stood behind their product and sent me a new one. They recommended not storing the batteries inside the device as they will drain over time (apparently 3 months or so...). I have not yet needed to use it but it tested fine. I am increasing the number of stars and changing the title to reflect my positive experience with the manufacturer.

Unit has a very strong magnet in the base for sticking to you're car or anything else made of metal. The Amber LED in the unit seems plenty bright for a passing motorist to see at night, but during the day you would be better off sticking with you're standard incendiary flare. The pro-version claims to boast a 1 watt led instead of 1/2 watt, which probably would make the difference for daytime operation. As for the tight battery compartment, while it's is a tight fit the batteries seemed to pop in to the unit without a problem. I feel it was designed this way so the unit continues to function even under the vibrations of being run over, if the compartment was looser the batteries might dislodge as they often do in a TV remote and then the user would have to go in to harms way to get the flare functioning again. A nice addition would be a strap to pull the batteries out of the unit when it's time to change them. I haven't tested how long the unit functions on a fresh set of batteries, but the manufacturer claims 70+ hours in flash mode. I'd also like to get a second one and see if the sync flashing feature works. For the price I would say this is a very well build device, it even has a o-ring to keep water out of the internals of the unit.