They're safe for dogs 5-120 lbs, from 6 months to 8 years old. The ergonomic design fits nicely in your hand, while a carabiner lets you take this ultrasonic dog bark deterrent anywhere. It has sound and ultrasonic modes with a frequency of 25 kHz that's hard for humans to hear.
eBay
The Dog Bark Deterrent Device does not require constant charging, so you don't have to worry about battery issues during outdoor activities. Built-in LED Makes Night Walks Easy: Enjoy a worry-free night walk with the Dog Behavior Correction Device built-in LED flashlight.
eBay
eBay
Whether it is sunny, rainy or snowy, our barking deterrent can stand the test, so you don't have to be unable to use it because of weather reasons. Easily install it on a table, fence, doghouse or tree—or take it along for outdoor activities.
eBay
Working Principle: The ultrasonic dog repeller emits 25KHz waves (audible to dogs 15Hz-50KHz). 1 x Ultrasonic Dog Repeller. which don't harm but deter barking and aggressive dogs.Target Audience: Effective for large, fierce.
eBay
eBay
🔹 【RSPCA-Aligned Safety】 - Emits ultrasonic waves inaudible to humans. Independently verified by Animal Behaviour Training College UK - zero pain, 100% non-shock. Complies with UK Animal Welfare Act 2006.
eBay
Emitting high-frequency sound waves that dogs can hear but people can't, it's safe and effective without harming animals. Keep your dogs' behavior in check with our Ultrasonic Dog Barking Device! Ultrasonic Dog Barking Device 1.
eBay