IMPROVE THE EFFICIENCY OF TRAINING DOG - This MODUS ultrasonic dog training device combines training functions and bark control. The ultrasonic dog training device can effectively train your dogs to be obedient and stop some unwanted behaviors, such as barking, digging, eat something dirty or fight with other dogs and more. MODUS ultrasonic dog bark control device will help repress and deter the constant barking, allowing you to finally relax and work in peace. 100% SAFE TO YOU AND DOGS – Average human hearing frequency range is 20HZ~20KHZ, and the dog can hear a wider range from 15HZ to 120KHZ. MODUS ultrasonic bark control emits ultrasonic sound at 25KHZ. Based on the theory that ultrasound, so the sound cannot be heard by humans. MODUS dog bark control device doesn’t affect anyone or anything apart from pets within its range. Plants, family, furniture etc., will be left unaffected. MORE CONVENIENT TO CONTROL THE DOG OUTDOOR - MODUS ultrasonic Dog training device comes with an anti-static wrist strap, helping keep the device securely on your wrist. The ultrasonic dog training has an indicator that emits a green LED light when working. Powered by 4 AAA Alkaline battery (Included). The anti-barking device has a control range of 16.4 Ft, which makes it ideal for outdoor use. If you unloose the leash while walking a dog, you can use MODUS Dog Training to stop bad behaving. EASY TO USE – The MODUS ultrasonic bark control detects dog barking through the sensitive microphone located inside the device. Just only push of a button then it emits an ultrasonic sound which can only be heard by the dog. Press and keep the switch button for 10 seconds, the dog bark control will automatically turn off. And the effective range is 16.4ft. MODUS anti barking device produces a high-pitched ultrasonic sound that is irksome to dogs and at the same time it is soundless to the human. ERGONOMIC DESIGN AND 12 MONTH WARRANTY – Ergonomic design makes it easy to hold and control, MODUS ultrasonic dog training fits inside your palm nicely. Note: The product may not be effective on dogs with hearing problems; the product cannot be used for dogs under six months. Note: In order to allow the dog to gradually develop a good habit, it is necessary to continue to use the device for a certain period of time in addition to the owner’s guiding commands.