Ultrasonic Rodent Repellent for Car Engine - Battery Powered Under Hood Animal Repeller with Flashing Strobe Light, Keeps Rats and Mice Away from Vehicle, Automobile, Truck, Garage, Attic, Pack of 2

I bought this as a preventative for mice intrusion into my car and truck. I had a mouse problem while living in Virginia now in Nevada. Luckily the mice did not chew on my wiring just started nesting. I installed this on my new car and have not had any signs of mice so far. The lights are a nice feature that gives you a quick visual to see that It’s on and if lights weren’t on, time to replace the batteries. I’m happy with no signs of mice!

I had a problem with rats building a nest in the engine compartment of my RV built on a Mercedes Diesel Sprinter chassis. I tried everything from professional solutions to various online hacks. Nothing worked until I purchased a pair of these. I placed them in the engine compartment. They immediately worked and after over 6 months there has been no rat problem. I also have a barn with a tractor inside that had the same problem so I purchased another pair and no more rat problem. I recommend this with max stars. I would give it more than 5 stars if I could.

So, based on the mostly positive reviews I decided to give these a try. I even went above and beyond to prepare my car, as I had the engine compartment professionally cleaned to get rid of any trace of prior rodent activity. I placed one of these in the engine compartment using the ties, and the other sits in the cubby near the gear shift. For the first couple of months, I didn’t see any activity. However, one day I am driving and my odometer stops working. Then the check engine light comes on followed by the steering indicator light. And about the same time I lose power steering. Took it to our mechanic and sure enough, rodents had chewed through several wires causing the problem. Fortunately it only cost $270.00 to fix. I say fortunately, because our Toyota Corolla had $2,500.00 in rodent damage about seven years prior. Needless to say, these Ultrasonic Rat Repellants didn’t do jack! 8/23/22 I have an update and in turn, I am raising my rating. So, after they didn't work as described, I decided to try them with the sound on (in Test mode). And guess what? After 3 weeks of parking it in the same spot, they did not eat the wires again. In fact, I see no evidence of them being in the engine compartment since the last episode. I will continue to use them with the sound on. If they didn't work for anyone else in the Ultrasonic mode, then try them with the sound on. It has worked for me so far.

Before ordering, we had no idea if these would work. Based on research, it's a toss-up. These and a few other gadgets like this have been installed and on 24/7 throughout our house for several weeks, and the number of mice seen has gone from one (or heaven forbid, two) a week to zero. None in the traps or caught by our cats. The only thing changed is adding these electronic repellers. Our cats are disappointed at the reduction in play toys, but we are not and neither is our pest control guy. When we set these up, he couldn't say if they'd work or not, but even he is impressed that there has been a major reduction in mice even though it's freezing outside and the mouse population should have gone up inside as mice seek shelter from the weather. We live in the country, so mice are a given. We have cats and a dog, so we don't want to use any kind of poison since our cats have gotten ahold of a couple of mice. If the mice are poisoned and the cat eat them, it would probably be too late for vet care before we realized what happened. Of course we take all the preventative steps we can like not leaving any pet or people food out, putting out pet safe mice deterrent, etc. There are baited snap traps all over the attic, basement, closets, etc. but mice would still sneak into the house. Even our pest control guy said that without poison baiting, it would be a constant battle since mice can get into a home through the teeniest openings and a house in a place where they have a lot of natural predators is a spot mice will seek out for safety. We live across from a nature preserve with several species of predator birds such as eagles and hawks as well as coyotes, foxes, and such. These little battery powered units are easy to operate. We just had to set a reminder on the calendar to change out the batteries every five to six weeks. None of uur pets are not bothered by the lights or noises put out through the speakers. They're also small enough to be put almost anywhere, and are not intrusive in the least. So far they have been amazing in our constant battle against mice and even a random squirrel, and we highly recommend.

Wasted my money on a 2-pack. Started the daily-driver and could smell grass burning. Saw that rodents decided to start nesting. Cleaned out the engine bays of 2 vehicles, then sprayed Peppermint rodent deterrent HEAVILY. Smelled great! Ordered these electronic deterrent as well. First morning, and rodent activity in both engine bays! As you can see from the pics, I don't think I could have mounted either device any better. Clearly didn't work at all.

So easy to install batteries. Guide is excellent. Once batteries were in, all the test lights did what they were supposed to do. Put one in our attic, one in a kitchen drawer that is a mouse magnet, one in our barbecue and one in a box with a fire pit glass shield on the deck. Just installed them so hope the rodents hate them! Update December 2023. We have used these for a few months now and haven't heard a mouse in the walls or drawers. We've lived in our country house for 45 years and have put up with the awful smell of dead mice, especially in the bathroom walls. Within a month of installing these repellents, the mice apparently have moved on as there are no mouse sounds anywhere. They are advertised for cars, but work for houses, too. They are spendy, but worked for us and are so much better than poison. We are hoping the mice don't get used to them and will continue to go elsewhere.

I just installed these on a motorhome. The first thing I noticed is that the battery cover is on the bottom of the unit so that if you want to mount it on a flat surface, you will have to unmount it to change the batteries. The battery cover is also attached by a very small screw. The screw is loose instead of having a way of sticking to the cover. The chances of losing that screw are extremely high. In their defense, they supply you with extra screws and plenty of wire ties for mounting. I'm fairly disorganized, so finding my little packet of screws and wire ties when it comes time to change the batteries, is highly unlikely. The wire ties were a good way to mount these-no screws needed. A great improvement on this product would be a side access for batteries with a door that clips on without a teeny tiny screw. The second thing I noticed after installing the batteries: The first unit cycled every 15 seconds or so...with an audible beep. That doesn't sound like ultrasonic to me. The second unit flashed once, with no audible sound, and then did nothing. It took me awhile to realize it was cycling every 5 minutes or so. On the second cycle, only the green light lit. Instead of flashing, it stayed on for several seconds. On the third cycle, all the lights flashed like they are supposed to. I have no idea if these things will actually work yet. I have doubts because of the difference in how differently the two I got operated. I hope they do. I bought these because mice decided my main wiring harness would make a nice meal. That cost me $3,500.00. I wish I could review the idiots that thought using a soy product for a wiring harness was a good idea. Duh. Might as well smear it with peanut butter.

They work great!