No Irritating Spray Gas and Shock, just working when they stop barking device sensor catch barking voice. Adjusting the frequency for each week can keep the training effect. When working in 3 levels, the light will flash blue every 6s; Red light stays on 3s when the sonic bark deterrent is triggered by barking; Red light will flash when in low power.
eBay
Designed like an alarm clock, it has 4 speakers and can be hung on a tree, anywhere in the house, or in your yard. Designed for outside use, the bark arrester is enduring and waterproof. There are 3 levels of sensitivity (effective scope about 50 feet).
eBay
Features:-It can get the dog's attention and quickly correct their bad behaviors within 1 second, such as barking, digging, chewing, scratching, biting, etc.-It emits a fixed ultrasonic frequency of 25kHz, a flexible ultrasonic frequency within the range of 20~30kHz, and different frequencies have different effects on different dogs.-Equipped with a powerful LED flashlight for easy use, it ensures visibility and safety during nighttime activities.-Built-in 2000mAh rechargeable battery, 2 hours USB fast charging, that lasts for more than 60 days.-The compact design makes it more suitable for ordinary people to hold and easy to carry.Specifications:Colour: black&orangeSize: length 4.72 inchesMaterial: ABSBattery capacity: 2000mAhEffective distanc.
eBay
The sensitive microphone can automatically detect dog barking from 50 feet away (also suitable for neighbors' dogs!). -This device is suitable for most breeds and sizes of dogs, except for dogs with hearing problems or under 6 months old.
eBay
Features: -It emits safe sound waves (25-30KHz) to attract your dog's attention and prevent bad behavior. -The maximum applicable distance is 10m, and the optimal distance is 5m (ultrasonic waves cannot penetrate obstacles). -Built-in 800mAh rechargeable lithium-ion battery, can be used for up to 60 days per charge. -With low/medium/high frequency mode, this ultrasonic wave will not cause harm to dogs, but can effectively stop dogs from barking and aggressive behavior. -Equipped with two high-brightness LED lights, you can turn on the spotlight with one button, allowing you to walk safely and worry-free even in the dark. .
eBay
Features:-It emits safe sound waves (25-30KHz) to attract your dog's attention and prevent bad behavior.-The maximum applicable distance is 10m, and the optimal distance is 5m (ultrasonic waves cannot penetrate obstacles).-Built-in 800mAh rechargeable lithium-ion battery, can be used for up to 60 days per charge.-With low/medium/high frequency mode, this ultrasonic wave will not cause harm to dogs, but can effectively stop dogs from barking and aggressive behavior.-Equipped with two high-brightness LED lights, you can turn on the spotlight with one button, allowing you to walk safely and worry-free even in the dark.Specifications:Color: orangeController type: Button controlMaterial: plasticInput voltage/current: 5V/2A (DC)Working sound wave: 25kHz-30kHzS.
eBay
Item Type:Dog Repellent. function is one of the super ultrasonic. Ultrasonic wave reaches up to 125db. Audible to dogs but not to human. Used to prevent dog attacks, issue ultrasound to repel the dog or wild wolf.
eBay
Ultrasonic anti-barking device can automatically detect dog barking from 50 feet away. Can be hung on trees, indoor, outdoor walls or fences to prevent dogs from barking (in range). There are 4 frequencies for ultrasonic waves to choose from.
eBay