Bark Free has a specially designed sound selector that lets you choose ultrasonic frequencies which can only be heard by dogs and cats, or lower sound tones audible to human ears. Bark Free uses an old age principle of “Negative Reenforcement using Sound”
Trains dogs to stop annoying barking without using shocks or physical pulses
Picks up barking from 25-foot radius
Works with any size or breed of dog
Choose from audible or ultrasonic frequency settings
Includes 50-foot power cord;
