[Elisandra]

the way the bark system works is as follows:
Automatic and manual ultrasonic bark control unit controls dog's barking behavior
* Sleek, tabletop device emits a 2-second ultrasonic tone
* Correction is effective up to 20 feet away


Tabletop bark control device gives your dog an automatic or a manual ultrasonic tone correction when he barks. The internal microphone senses his barking and emits a 2-second ultrasonic tone that only he hears. He is startled, and he quickly learns to associate his behavior with the irritating sound. The unit can also be operated manually to stop other unwanted behaviors, such as digging in the trash or chewing. Correction is effective up to 10 feet in Automatic mode and 20 feet when used manually. Powered by a 9-volt battery (not included). Measures 5" x 3-1/2" x 2". For all dogs. Lifetime limited manufacturer's warranty.


I also posted another picture of the size of the vest


the leather like jacket is a size 10 but it runs small so it would be like a size 7/8.