Electronic Dog Repeller and Trainer with Ultrasonic High-Frequency Sound – Dual Training and Deterrence Modes, 35-45kHz Range, 9V Battery, ABS Plastic Body

SKU: ST-DOGREPEL
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$19.00

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I picked one of these up for a neighbor who does a lot of early-morning walking and kept running into the same loose dog on her route. Simple device — point it at the dog, press the button, and the high-frequency sound does the work. Dogs hear it clearly, people around you mostly don't. It's not a gadget you have to figure out; it's a push-button solution to a specific problem.

  • Ultrasonic 35-45kHz frequency — effective range that dogs can hear clearly but is mostly inaudible to humans
  • Dual operating modes — switch between training mode and dog deterrence mode
  • Compact and lightweight — 5.5" x 2.25" x 1.13", 0.3 lbs, easy to slip into a pocket or clip to a bag
  • Simple operation — point, press, done — no complicated setup or programming
  • Runs on a standard 9V battery — easy to replace, widely available

A Straightforward Solution to a Common Problem

Loose dogs are a nuisance at best and a genuine concern at worst, depending on the animal. This device emits a high-frequency ultrasonic sound in the 35-45kHz range — well above what most humans can detect, but clearly audible and unpleasant to dogs. It’s not harmful to the animal; it’s just disruptive enough to interrupt aggressive or unwanted behavior and redirect their attention.

The same technology works for training your own dog. The dual-mode design lets you use it to reinforce commands and discourage bad habits at home, then switch it over to deterrence mode when you’re out walking and want some extra confidence around unfamiliar dogs. One tool, two practical uses.

Who This Dog Repeller Is For

Walkers and runners who cover the same routes and have encountered the same territorial or aggressive dogs. It’s one of those tools where once you carry it, you stop thinking about that one stretch of road that used to make you nervous. Mail carriers, delivery drivers, meter readers — anyone whose job puts them near unfamiliar dogs regularly would find this useful too.

It’s also a good tool for dog owners who want a humane, non-invasive way to work on behavior issues at home. The training mode lets you interrupt barking, jumping, or other unwanted behaviors with a sound cue the dog responds to, without raising your voice or using physical correction.

Parents who want something in their kid’s bag for a walk home from school — it’s small enough to carry and simple enough that a teenager can use it without any instruction.

Is This the Right Choice for You?

Choose this dog repeller if you want:

  • A humane, non-contact way to deter aggressive or territorial dogs while walking or running
  • A training tool for your own dog that doesn’t require treats or physical correction
  • Something small, simple, and pocket-friendly you’ll actually have with you
  • A device that works on dogs without being audible or disruptive to people nearby

Consider something else if you need:

  • Protection against something other than dogs — this is a single-purpose canine deterrent
  • A loud audible alarm that alerts other people nearby — this device is largely silent to humans
  • Bear deterrence — for bear country, you’ll want bear spray, not an ultrasonic device

How It Actually Works

Ultrasonic sound in the 35-45kHz range sits above the typical threshold of human hearing — most adults can’t detect it at all, though some children and younger people may hear a faint tone. Dogs hear this range clearly, and the sound is disruptive enough to interrupt their focus and discourage approach or aggressive behavior.

The two modes serve different purposes. In training mode, the frequency pattern is calibrated to get your dog’s attention and associate a sound cue with a command — useful for interrupting barking or reinforcing recall. In deterrence mode, the output is set to discourage approach from unfamiliar dogs without causing harm to the animal.

The device is small enough to keep in a jacket pocket or clip to a bag without any real inconvenience. The 9V battery is widely available and lasts a reasonable time with typical use — it’s not something you’ll find yourself replacing constantly.

Quick Comparison: How Does This Dog Repeller Stack Up?

Feature Ultrasonic Dog Repeller Pepper Spray Personal Alarm Walking Stick / Baton Dog Whistle
Effect on Dog Ultrasonic deterrent ✓ Direct irritant ✓ Loud noise deterrent Physical barrier Attention-getting sound
Humane / Non-Contact Yes ✓ Direct contact irritant Yes ✓ May require contact Yes ✓
Training Use Yes — dual mode ✓ No No No Limited ✓
Alerts Bystanders No — silent to humans No Yes — 120dB ✓ No Audible to some
Size / Carry Pocket-sized ✓ Pocket-sized ✓ Keychain size ✓ Bulky Very small ✓
Best For Dog deterrence + training Serious canine or human threat Drawing attention, human threats Physical deterrence Basic training only

Practical Details

Dimensions: 5.5″ x 2.25″ x 1.13″. Weight: 0.3 lbs. Material: ABS plastic, black. Frequency range: 35-45kHz ultrasonic. Two operating modes: training and deterrence. Power: one standard 9V battery (not included). Made by Safety Technology. Effective for canine deterrence and behavior training.

If you walk, run, or work outdoors and want a simple, humane way to handle encounters with unfamiliar dogs — or a training tool for your own — this one does exactly what it’s supposed to without making a big production of it.

Frequently Asked Questions

Does the ultrasonic sound hurt the dog?

No — it’s disruptive and unpleasant to the dog’s hearing, but it doesn’t cause physical harm. It functions more like a startling noise that interrupts their behavior and discourages approach. Think of it as the canine equivalent of a loud clap that gets their attention and redirects them. It’s specifically designed to be a humane deterrent, not an injurious device.

How far away does it work?

Effective range depends on the individual dog, ambient noise levels, and the direction you’re pointing the device. Generally speaking, ultrasonic repellers like this work best within 15-20 feet of the animal when pointed directly at them. Results can vary based on the dog’s age, hearing sensitivity, and temperament — some dogs respond strongly, others are less affected. It’s most reliable as a first-response tool, not a guaranteed stop at distance.

Can humans hear the ultrasonic frequency?

Most adults cannot. The 35-45kHz range is well above the upper limit of typical human hearing, which tops out around 20kHz for most people. Children and younger adults with better high-frequency hearing might detect a faint sound, but it’s not distressing. The device is designed so you can use it in public without creating a disturbance or bothering the people around you.

What’s the difference between training mode and deterrence mode?

Training mode emits a frequency pattern calibrated to get your dog’s attention — it’s a communication tool designed to interrupt behavior and help reinforce commands. It works best paired with consistent training and positive reinforcement. Deterrence mode outputs a signal designed to discourage unfamiliar or aggressive dogs from approaching. The two modes let you use one device both at home for training and outdoors for protection during walks.

ManufacturerSafety Technology
Frequency35 to 45HKZ
BatteryOne 9 Volt
MaterialABS Plastic
ColorBlack
Weight0.3 lbs
Dimensions5.5" x 2.25" x 1.13"

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