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
1 x Bark Arrester. Item Type: Bark Deterrents. Training supplies: It can be used as a tool to train your pet and improve the bad behavior of dogs. Portable: It can be used as a portable tool to drive away dogs when they are mad outdoors, so as to protect their own safety.
eBay
Simple and easy to use, just install the battery to start, automatically sense animal activities within the range and emit ultrasonic to drive them away. The ultrasonic frequency is designed for dogs, humans cannot hear any sound, avoid noise interference to neighbors, quiet and efficient.
eBay
Ltrasound Dog Chaser. 1X Ultrasound Dog Chaser. It can also be used as a normal flashlight to illuminate at night. Ultrasonic wave reaches up to 125 db, audible to dogs but not to human. Ideal for preventing dog attacks, issue ultrasound to repel the dog or wild wolf.
eBay
Stop your dog from barking excessively with this ultrasonic anti-barking device. The compact design makes it easy to take on-the-go, and the device is suitable for large, docile, and small dog breeds. It has a battery capacity of 1500mah and is made of durable ABS material. The device comes with three modes to choose from, and it emits an ultrasonic sound that is inaudible to humans but irritating to dogs. It is perfect for outdoor use and can help you train your dog to stop barking excessively. Get your hands on this anti-barking device today and enjoy a quieter life with your furry friend.
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. .
eBay
Simple and easy to use, just install the battery to start, automatically sense animal activities within the range and emit ultrasonic to drive them away. The ultrasonic frequency is designed for dogs, humans cannot hear any sound, avoid noise interference to neighbors, quiet and efficient.
eBay
The device transmits an ultrasonic high pitched sound (115 dBA) that only dogs can hear which essentially distracts dogs, humanely. Ultrasonic Anti Dog Barking Trainer LED Light Gentle Chaser Petgentle Sonics.
eBay