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Handheld Device Uses Ultrasonic Sound & High Output Safety Alarm

Optional Protection Plan

Or Buy Pre-Owned for

Product Features

High Output Ultrasonic Sound

Loud, Pulsating Safety Alarm

Brilliant LED Flashlight

Great for

Outdoor Enthusiasts

Delivery & Utility Workers

Dog Owners

Handheld Dog Trainer

Repel unwanted dogs or stop your own dog’s unwanted behavior with OnGuard™. This handheld deterrent works by emitting ultrasonic sound. The high-pitched noise is silent to you but really irritating to dogs. Now you can repel approaching dogs on your walk, run or bike ride or use OnGuard™ to stop your dog’s unwanted behaviors like jumping on furniture and barking at the door.

  1. Overview
  2. Videos
  3. Comparison
  4. Specifications
  5. FAQs
  6. 90 Day Guarantee
Ultrasonic Dog Repeller - Personal Safety Alarm - High Output Flashlight

OnGuard™ 3-in-1 Dog Trainer & Safety Alarm

Stop Your Dog's Unwanted Behavior.

Use OnGuard's ultrasonic function to deter your dog from unwanted behaviors like barking or jumping on the furniture. This technique helps stop bad habits all while being completely safe and humane.

Become the Center of Attention.

Quickly draw attention to your location by activating the loud, pulsating panic alarm. The audible alarm can be turned on (and stay on) if needed in an emergency situation.

Light Up the Dark.

Illuminate dark parking lots, paths, and rooms with the OnGuard's high output LED flashlight. Use the flashlight in constant mode or switch to the strobe option if necessary.

Repel Unwanted Dogs.

With the push of a button, OnGuard™ repels dogs up to 50 feet away using a stream of ultrasonic sound. This high-pitched sound is inaudible to you, but has a strong repelling effect on approaching dogs.

Easy to Carry. Comfortable to Hold.

The ergonomic hand grip and dual rubber coating make taking OnGuard™ on your next neighborhood walk, jog, or bike ride easy. OnGuard™ also comes with a convenient wrist lanyard.

Help Us Spread the Word!

While you are here, please take just 2 minutes and text or email our website ( to your family and friends who have dogs, so they too will know that there is a safe and humane option to stop dog barking and to train dogs!


Ultrasonic Dog Repeller - Personal Safety Alarm - High Output Flashlight


  • Ultrasonic Output: +105db @ 1 meter
  • Audible Alarm Output: +100 db @ 1 meter
  • Light Output: 4,800 lux @ 1 foot
  • Uses 4 AA batteries - Not Included
  • Weight: 3.9oz without batteries, 7.4oz with batteries
  • Dimensions: 5.9" (L) x 2.3" (H) x 1.8" (W)
  • Dual Rubber Coating
  • Lanyard attachment included

Loading Batteries into the OnGuard

OnGuard ultrasonic output test

Frequently Asked Questions

What is ultrasonic sound?

Ultrasonic sound frequencies are above the hearing range of humans. Although this noise is inaudible to most humans, dogs hear it loud and clear. This high-pitched noise is alarming and unpleasant to dog being targeted, but completely safe and humane.


Will OnGuard™ work on dogs in other rooms or on the other side of a fence?

Ultrasonic sound cannot travel through solid objects like walls or solid fences. Make sure OnGuard™ is in clear line of sight of the dog you wish to train or deter.


Will this protect me from an attacking dog?

Dogs can be unpredictable and while it is designed to repel them, we cannot guarantee it will deter an overly aggressive dog.


Will this hurt the dog?

No. Although the ultrasonic sound emitted by OnGuard™ is a great tool for repelling and training, it is physically harmless to dogs.


Can I use this to train my puppy?

Due to the powerful nature of this product, it is not recommended for use on puppies under 6 months old as they are still developing their hearing.


What’s the blue light on top for?

The blue LED light on top of the unit indicates the ultrasonic button has been pressed and ultrasonic sound is being emitted.


What is the range?

The ultrasonic frequencies can be heard by dogs up to 50 feet away (for training purposes), and can repel dogs up to 50 feet away.



90 Day Money Back Guarantee

Don't worry! We've got you covered. OnGuard™ is backed by a 90 Day Money Back Guarantee which starts the day you receive your order. If for any reason you're unsatisfied with OnGuard™ during this time period, contact us. We'll issue you an RMA and refund the product price.

1 Year Manufacturer's Warranty

OnGuard™ is also backed by a 1 Year Manufacturer's Warranty. This protects you in the unlikely event there are any manufacturer defects.

Additional Protection Plans

Dog Silencer Protection Plan + Accidental Coverage Dog Silencer Protection Plan + Accidental Coverage Dog Silencer Protection Plan + Accidental Coverage
2 Year Protection Plan

3 Year Protection Plan

3 Year Protection Plan + Accidental Coverage


OnGuard™ Features

OnGuard™ is a handheld device that allows you to do 1-on-1 training with your dog. Use it to reinforce training commands and stop undesirable habits such as barking at the door or jumping on the furniture.

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