About MODUS Bark Control Device - Ultrasonic Dog Bark Deterrent
The bark control device has a direct control range of 16.4ft. Due to the sound nature, the noise is difficult to pass through the obstacle material - please use the device in clear sight by pointing your dog directly. The ultrasonic barking device works on dogs' hearing, so it can be used to control dogs of all sizes. It isn't effective on dogs who are hearing impaired. We recommend using this product for dogs above 6 months and under 8 years. When the button is pressed, if the LED light shows red, it indicates the bark control device has low power.