Loraffe Battery Operated Ultrasonic Under Hood Rodent Repellent for Car Engines

6/6/26 Update: I installed this device three weeks ago and since then, I have seen ZERO indication of rodent intrusion. None on top of the engine cover and none under it, which are locations where they had set up shop in the past. Months before installing this product, I had tried slathering the surfaces with hot sauce on the recommendation of a member of an Odyssey forum I frequent. I lost tract of exactly what brand they used but mine was "red." It did NOT work, but it DID cause the aluminum parts touched by the sauce to produce a not-so-nice layer of white corrosion. I had to wire brush all that off and wash the plastic cover throughly. In the past I had also added steel wool to the top of the engine between it and the cover to block rodent entry. All that did was divert them to the top of the engine cover rather than under it. I removed the steel wool today so I'll continue to check under the cover for a few more weeks. If they reappear, I'll update this review. If they don't, I won't. BTW: our second car, which has the same engine and very similar engine cover, is parked about 14' (center to center) away from and parallel too the vehicle with the device installed under the close side of the hood. Both vehicles, in the past had the same rodent problems and were treated identically to keep them away. I also cleaned the second vehicle same as noted above. The thing is, the second vehicle has also had ZERO visible rodent attacks even though no device was installed. I guess it will serve as an experimental control subject 😂 The ambient temps have been between 85 and 91. So that might be why they haven't set up shop again. This project and my observations will be ongoing. I will update this review with any changes, and then the weather gets cooler, like in mid-November 😔 I'll let you know if they are staying away! Oh yeah... I upgraded my rating to five stars.👍🏻 Original: Unit seems to be well built, operates as described and batteries are easy to replace if you locate the unit strategically. The white zips included are the type that can easily and non-destructively be removed. Here's my criticism... (1)the documentation (user manual) is a bit vague regarding the choice of actions on the red toggle switch...Test/Ultra. I have it set to Ultra during operation since that is the obvious choice but I was looking for explicit instructions to do so. (2) the accompanying paper manual is a foldout and is very small. I always save a digital copy of all manuals for future reference so I searched the web but could not find it. Customer service promptly and politely emailed me one BUT it was a low resolution scan of the paper version. Which, was kinda weird in that when I saved it to my iCloud file system, it took a long time for each area of the two images to "focus." So I thought, ok let me make a screen shot of it and crop out all but page one, thinking I'd do that for each page and save them in order. The problem was that the resolution was so low that zooming in resulted in a really lame image. So this told me that scanning with my phone would be pointless. So I cut the foldout paper manual into individual pages, used my old Epson 2400 flatbed scanner to create color-300dpi scans of each page to create my own high res booklet. I emailed CS with my issue and solution and they were conciliatory and pleased that I took the time to express my thoughts on the matter. So that being said, I think this is a good product using a separate power source (not my car battery) made by a good company with good ideas. Will it fix my rodent issue? Time will tell but I felt that I should write this review of the known, while things are fresh in my mind.

How bad was my rodent problem? My auto insurance agent told me that my vehicle was his first total lost due to rodent damage in 35 years. Our late model Honda became a 5-Star resort for mountain mice. Under every seat, behind the dash, in the AC vents, in the headliner and even in the door panels they resided. Snacked on the wiring and ate all the paper work in the glove box. I placed two of these ultrasonic units under the hood of our new Honda. So far, no trace of any mice. I drive the new vehicle everyday and May 01st, was 60 days operating and the AA batteries are still providing power. The units flash white and green strobes. I’m partially deaf, so I can't hear the ultrasonic sound it emits. I’ll do another update in several months. At this time, the product is working.

So far I like the product. Easy to set up. Hopefully the will deter the mouse issue we are having

I bought this for when I was going to leave my car in my sister‘s garage for a month. She has had problems in the past with creatures eating parts of her car. She also uses this model on two of the spaces and mine was on the third space and I have had no problem and have heard no report of problems.

This unit does not work as advertised. I was very disappointed because I just bought two new cars and of course I'm concerned about pack rats and mice getting underneath the hood and eating the wiring. The previous car I had to extensively rewire the whole right side of the car from rats. After that point I was very proactive and I didn't have rats again. However I regress, I bought two similar electronic rat deterrent units. I have them under the hood of both new cars. So far I haven't had any rats, but that might be just coincidence. Now to the core of my review, I've been having a rat get on my patio and peeing in the same location in a corner every night until it was completely yellow with rat poops all over the place. I cleaned with bleach with pine-sol, you name it rinsed it all down, cleaner than my house. For a few days I didn't get any more rats I thought well the bleach did it. Then I had two of these units that I hadn't used yet, I put batteries in one put it out on the patio right next to the rat latrine. I checked it every night make sure it was working, lights were flashing unit seem to be working properly. After 4 or 5 days I noticed feces on the patio. I thought oh a rat scampered onto the patio to use the bathroom or and Mark it's territory. After finding out that the patio had a rat be gone deterrent it ran away. I went out today to look in the corner where the rat was peeing all the time, and lo and behold there was pee all over the place and poops. Guess what, this rat away unit was one foot away from where the rat was marking his territory. My conclusion don't waste your money. Before I put this under the hood of my new car I thought oh I'll test it where I know there is a delinquent rat to see if it works. What a disappointment and what a waste of money. One star I'd give it zero if I could

ours (ZN-509) is utilized beneath the belly of a trike which lives outside under a bike cover & a metal carport when not in use. our bike mechanic discovered a 'nest' (of some sort) fashioned in the compartment which houses the air filter of our trike last winter during annual "winterizing" & regular maintenance. at a loss, we decided to give this gizmo a try since our options are relatively limited. thanks to fellow, kind, community members' reviews, we bought this Loraffe model for the trike situation & another 'big brother' Loraffe for our 10'x12' metal shed out back (the much larger, triangular shaped, "4-in-1" model w/ two speakers & flashing LED's). both products have been used for a month & so far, so good! the one in the shed is plugged in 24/7 & the one on the concrete carport pad beneath the trike (this model above) runs on batteries. we haven't had to replace the batteries yet after 1 month but it's only "on"/ running during the evening & wee hours of morning. i see no indication of any rodent invasion in or around the trike since appropriating this unit about a month ago... again, so far, so good. i like the compact size of this model & might imagine it could impart lots of beneficial uses in a wide variety of places or applicable situations. iow's, it's small & portable & will run w/ standard AA's (3). yes, it's made in China. yes, it comes w/ a 1 year warranty. yes, you must remove the back plate to install batteries b/c that plate is secured by 1 tiny screw (the kit comes w/ a handy, tiny screwdriver + 8 tiny "zip" ties & 2 extra tiny screws). personally, i see no problem w/ this design but ymmv. Conclusion: would I recommend the product (or, Loraffe in general)? so far, absolutely. would I buy again? whelp, hopefully not b/c we hope the two we've already invested in will work as intended/ advertised for years to come. the ZN-509 emits both ultrasonic sounds & LED strobe effect lights which 'cycle' through 5 stages about every 113 seconds. there is both a red indicator light & a beeping sound emitted from the unit (per manual) when low power (<3.3 volts) is reached & batteries need replacing. there are two switches: an On/Off switch and the "Test" switch. that's it. we dwell in the ATL, GA suburbs (for context) in an older subdivision & our property (about 1/2 an acre) is adjacent to about 2 acres of natural, wooded area which also extends around the rear of our property line. we've been here about 17 years & rodents (mostly squirrels & field mice) have been the major culprit of our rodent dilemma. between the Loraffe's, the annual owls & hawks, we're optimistic that that dilemma will prove mitigated once and for all... time will tell.

Sometimes it flashes when I get close to a building or when i get in the car of the morning. I'm not sure it's doing much good. Looks like mice are still in my car.

UPDATE***** The first Loraffe Ultrasonic mouse repeller worked so well I ordered a second one to use in our camper van. I am really impressed with the battery life on these things. Even though the instructions recommend alkaline AA batteries, I just did a 10 day trail 24 hours a day using (3) 2800AH rechargeable lithiums and it is still running strong. The repeller cycles starting with flashing strobe / ultrasonic sound for a full 15 seconds, and then off for 35 seconds, then beeping ultrasound for another 15 seconds, then starts the flashing strobe/ultrasound cycle again. This is perfect, and I like this a lot more then the constant flashing and ultrasound continuously for 24 hours. When we camp, I either put the Loraffe repeller on top of the engine and let it run 24 hours, or put it on the ground between the front wheels and only run it from duck to dawn. We've camped in primitive spots in the high desert of central OR and northern CA, and west of the Cascades in rodent prone areas and have yet to have another one get into the van. >>>>>>original review from May 2025>>>>> I ordered the Loraffe Ultrasonic Mouse Repeller to use in our camper van after a frightful 2 nights of mice during a recent trip. We've cleaned and bleached the van, put peppermint sticks into crevices at the headliner and floor, and have 2 couple of battery operated traps. We will be using the Ultrasonic placed under the engine after we stop to camp. At first I was hesitant, not knowing how our 10 year old basenji would react to the ultrasonic feature, but testing this out three feet from her while she was sleeping, the high frequency sound doesn't appear to affect her. Time will tell if this deters mice from getting into our van, but no mice is a good sign. >>>>>

Hasra el momento ha funcionado muy bien

No funciona. Hase unos ruidos.

No sirve para nada