Question 1

How much battery life can I realistically expect in my car, and will it drain my starter battery?**

Accepted Answer

The BORHOOD unit runs on 4 AA batteries (not included) and typically lasts between 1–3 weeks in a car used daily, depending on temperature and usage patterns. It does not connect to your car's electrical system, so it won't drain your starter battery. However, extreme cold can shorten battery life, so if you park in freezing weather, expect to replace batteries more often—some TikTok users recommend checking them every 2 weeks during winter.

Question 2

Is the sound from this repellent audible to my dog, cat, or pet rodents?**

Accepted Answer

While the ultrasonic frequency is primarily designed for rodents, some pets with sensitive hearing—especially small dogs and cats—may notice the sound. We recommend placing the unit in areas where your pet doesn't spend long hours (like garages or under the car hood). If you have pet hamsters, guinea pigs, or rabbits nearby, choose a location farther from their living space, as they share similar hearing ranges with pest rodents. No negative effects are reported, but to be safe, observe your pet's behavior for the first few days.

Question 3

Will two units be enough for my garage or engine bay?**

Accepted Answer

The 2-pack is ideal for covering two smaller spaces (e.g., one unit per car engine bay, or one unit in a single-car garage). For larger garages (2+ cars) or open storage rooms, you may need additional units—users on Reddit suggest adding one unit per 200–300 sq. ft. for optimal coverage, especially if there are obstacles like workbenches or shelving that block sound waves. If you're targeting an engine bay, one unit clipped inside the hood is usually sufficient.

Question 4

How long until I see results, and what if the product doesn't work?**

Accepted Answer

Many users report noticing less rodent activity within 3 to 7 days of continuous use, though results can vary based on infestation size and space layout. For best results, ensure the unit has a clear line of sight to common rodent paths (no metal barriers blocking sound). BORHOOD offers a 30-day money-back guarantee if you're not satisfied—just contact their support team via your purchase platform for a return label. YouTube reviewers recommend checking for nests first; if the space is heavily infested, combine the repellent with sealing entry points for faster results.

Question 5

Can I use this outdoors, and will it survive rain or engine heat?**

Accepted Answer

This repellent is designed for indoor use, including garages, storage rooms, and under a car hood—but the hood area should be relatively sheltered. It is **not weatherproof** for direct rain exposure or constant high heat. In a car engine bay, mount it away from turbochargers, exhaust manifolds, or other extreme heat sources. The plastic housing handles typical engine compartment warmth but may warp in prolonged direct sun or heat above 140°F (60°C). For outdoor mounted use (like a garden shed), consider a weatherproof model instead.

BORHOOD Ultrasonic Rodent Repellent, 2 Pack Plug-in Mouse Rat Pest Bat Squirrels Repellent for Car with Battery Powered Under Hood, Keep Mice Out of Cars Engines, Indoor, Garage, Storage Room-Black

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