Built for the home the exterminator couldn't keep bed bug free.
Petzly was created because the bed bug control industry had a dirty secret, and too many families were paying for it twice.
She found the first bite the same week her youngest started crawling.
The exterminator quoted $1,400. The family, including the dog, had to leave for four hours while he treated. She paid. The bites came back six weeks later.
She tried bed bug spray. Then she read what those chemicals do near a crawling baby's hands. She tried mattress encasements and a steamer. She tried a cheap ultrasonic plug-in from Amazon. Nothing held.
Then she found a University of Arizona study: commercially available ultrasonic devices were not working because they used a single fixed frequency, one that bed bug nervous systems habituate to within days. The same way a person stops noticing a hum in a room, the bugs stop responding to a monotone signal.
She went looking for a device built around rotating multi-frequency technology instead. It did not exist. So she built it. That device became Petzly.
Backed by two decades of pest behavior research.
Dr. Anna Mitchell, PhD, spent over twenty years studying how pest nervous systems respond to environmental stimuli, including ultrasonic frequency. She was among the first researchers to identify the habituation problem that makes single-frequency devices useless against bed bugs.
When Petzly's founder approached her with the rotating multi-frequency concept, Dr. Mitchell immediately recognized it as the correct application of the science. She joined as Scientific Advisor and helped refine the frequency rotation parameters that make Petzly categorically different from every other device in the category.
"The science has always supported ultrasound as a bed bug deterrent. What the industry got wrong was the delivery. A rotating frequency is not a marketing claim, it is the mechanism that makes the science actually work."
One device per room. Your entire home, covered.
Because ultrasonic waves do not pass through solid walls, each Petzly unit is designed to protect a single room of up to 300 sq ft, the size of a standard bedroom, kitchen, or living area. Bed bugs that flee one room simply move to the next, so the rooms they can reach all need coverage.
Most customers start with three: one for the main bedroom, one for the kids' room, and one for wherever the bites are worst. From there, the coverage is complete, and continuous.
No maintenance. No refills. No appointments. Just plug it in and leave it running.
The cheap ones fail for a specific, fixable reason.
The FTC did not warn that ultrasound does not work. It warned that single-frequency devices do not work. Petzly was built around that distinction.
The Habituation Problem
Single-frequency devices emit a fixed tone. Bed bug nervous systems adapt to it within days, the same way you stop noticing a ticking clock. The device becomes background noise.
Rotating Multi-Frequency
Petzly continuously rotates its ultrasonic frequency every few seconds. Because the signal never settles into a fixed tone, bed bugs cannot acclimate, and the discomfort never becomes background noise.
Zero Compromise on Safety
No chemicals. No residue on floors or surfaces. Silent and odorless to humans, dogs, and cats. Safe in bedrooms, nurseries, and pet areas with no need to vacate.
"Your bedroom should feel like yours. Not like a problem you are managing at 2am."
That is the belief Petzly was built on. Not to sell devices, but to end the cycle of failed treatments, recurring exterminator bills, and the quiet shame of a bed bug problem that will not go away.
Four things we will never compromise on.
Honesty about the science
We tell you exactly what the research says, including what does not work and why. You deserve to understand the mechanism, not just take our word for it.
No chemicals. Ever.
Every member of the Petzly team has children or pets. We built the product we needed, one that clears the bedroom without creating a second hazard inside it.
A guarantee that actually means something
90 days. Full refund. No questions, no return shipping cost, no hoops. If Petzly does not clear the bed bugs in your home, we do not want your money.
One purchase. Permanent protection.
We do not sell subscriptions. We do not profit from repeat infestations. We make one device that works continuously for as long as it is plugged in.
Try it in your home for 90 days. If the bed bugs don't clear, you pay nothing.
Over 32,000 families have made the switch from chemicals and exterminators to Petzly. The guarantee exists because we know it works, and because you have been let down before and should not have to take that risk again.
Shop Petzly, Risk Free →