Portable Ultrasonic Dog Deterrent with Flashing LED

A loose dog charging across the park, or a barking dog rushing a fence, can turn a pleasant walk tense. This portable ultrasonic dog deterrent gives you something to reach for. Press the button and it emits a high-pitched ultrasonic sound, above the range most adults can hear, along with a flashing LED. Both are designed to interrupt an approaching dog's focus. At about 2 inches tall, it clips to your keys and recharges by USB-C.

How It Works

Dogs hear much higher frequencies than people do. This device sweeps between 23 and 40 kHz, above typical adult hearing, while the LED flashes to add a visual cue. Many dogs find a sudden high-pitched sound startling or unpleasant, and they'll pause, turn away, or back off.

It's a simple tool for walkers, joggers, and dog owners who want an extra option when an unfamiliar dog gets too close.

Key Features

• Ultrasonic sound: Sweeps from 23 to 40 kHz.
• Flashing LED: Adds a visual deterrent, especially helpful at night.
• Keychain size: 50 x 30 x 20 mm, with a built-in loop.
• USB-C rechargeable: A 180 mAh lithium battery, so there are no disposable cells.
• Auto shut-off protection: Turns off after 10 seconds of continuous use.

How to Use It

1. Point the front of the device toward the dog.
2. Press and hold the button for 2 to 8 seconds, release for 1 second, then press again.
3. If you hold it for more than 10 seconds, it shuts off automatically as a protective measure. Press the button again to restart.
4. Recharge it when the light starts to dim, since a low battery weakens the output.

When It Works Best, and When It Doesn't

An ultrasonic deterrent works best in quiet settings and on dogs that don't know you. It tends to be less effective in these situations:

• On noisy streets or in busy downtown areas
• With well-trained or confident dogs
• With dogs walking alongside their owners
• When the battery is low

It's not a guarantee of protection. If a dog seems aggressive, stay calm, avoid direct eye contact, back away slowly, and contact local animal control if needed.

Use It Responsibly

Only use the device when a dog is actually approaching or bothering you, and never to tease a dog. Using it repeatedly on the same dog can reduce how much it responds over time. If you're using it to help curb barking, pair the interruption with praise and rewards for quiet behavior. Find more tools in our dog training accessories.

Specifications

• Size: 50 x 30 x 20 mm (2 x 1.2 x 0.8 in)
• Frequency: 23–40 kHz, variable
• Light: Flashing LED
• Battery: 3.7V 180 mAh lithium
• Charging: USB-C
• Colors: Black, Orange

Clip it to your keys and walk with a little more confidence. Explore more gear in our dog deterrent essentials.