Why are dog bark collars an effective training tool? Dog bark collars are designed to stop your dog from barking during training, improving its behavior without the need for physical or verbal punishment. The dog will be healthier and get along well with family, friends and neighbors. It has shock and non-shock modes, beep + vibration, beep + vibration + static pulse. Just press the M button to switch modes and enjoy peace of mind. This anti-bark collar is suitable for large, medium and small dogs from 4 to 50 kg. How does it work? Place the collar around the dog's neck. When the dog's barking and throat vibrations reach a specific sound frequency that the sensor can detect, the sensor will automatically activate and emit a sound, followed by a vibration or electrostatic shock. This method can correct your dog's barking. Trigger the sensor to avoid any problems The trigger sensor built into this collar will detect all noises and then filter out only the barks to be triggered. A dog