<b>Who we are? What we care about?</b><br> As a pet-loving company, Modus has been designing and developing pet-friendly devices for years, including different types of barking control devices, anti-pulling devices, dog training remote & e-collar. We aim to help pet owners to control unwanted barking and stop dogs’ bad behaviors. More importantly, we care about not only the effective level, but your puppies’ feeling that all our product are set a safe and effective level.<br> <br> <b>What is special about Modus anti bark device?</b><br> Our Modus anti bark device uses latest ultrasonic technology. The average human hearing frequency range is between 20HZ and 20KHZ, and dogs can hear a wider range from 15HZ to 120KHZ. Because of the unique frequency, the sound is not audible to human, but can easily grab the dogs’ attention. The sound emitted is intended to be loud and distract dog’s current state of mind, which is safe to be used to stop the dog’s bad behaviors and to get rid of unwanted barking.<br> <br> When your dog barks or makes mischief, simply press and hold down the button to take the dog's focus off, we suggest you pay closely attention to a change in barking or a change in behavior, then you can reward him for the desired action to actively guide and strengthen his memory. The dog will eventually learn to associate the barking with the ultrasound, form a conditioned reflex and stop bad behaviors.<br> <br> Note:<br> 1. The product may not be effective on dogs with hearing problems.<br> 2. We do not recommend it for use on dogs under 6 months.<br> 3. This device is not intended to provide protection against aggressive dogs.<br> 4. In order to achieve long-lasting result, please be patient and consistently use the product as a training aid, along with commands and positive reinforcement.