Ultrasound design: Based on the theory that ultrasound, the dog trainer can effectively train your dogs to be obedient and stop some unwanted behaviors, such as barking, digging, chewing and more, also they are harmless to both humans and pets. How to use pet trainer: 1. Point your pet trainer directly at the dog or cat, always use an outstretched arm from a distance of approx. 2. Give the verbal demand, then immediately press the button for 1 or 2 seconds. 3. Repeat steps one and two until your pet responds to your demands. Features: The ultrasonic dog training device is widely applied, which can be applied at home, for dog walking, jogging, go hiking, dog training, both indoors and outdoors, practical and considerate. The devices to stop dogs barking can be shared with your fellows, family, neighbors, colleagues having dogs, they will be happy to receive. Package includes: 1 x Ultrasonic dog trainer 1 x User manual[Why buy Anti-Barking Device] No need to hire professional trainers. It'll save you lots of money and make you the trainer. Use it to train your own dog, Lightweight & compact dog training bark stopper works on a 9V battery(Included). Ultrasound bark. [How can I train my dog] Simply click “On” button and put an end to unwanted behavior with this dog training device. Excellent choice for daily training at home, at the dog park, or on a walk/hike with your doggy. Its portable design makes it easy to use indoor and outdoor. [Scared of dangerous dogs] Anti-bark Stopper has a 20feet control range (Longer than most other Handheld Dog Detterent). Protect yourself while Walking, Jogging or Bicycling. Carry it around to drive away unfriendly dogs encountered on the road. [Hate when neighbour's dog barks] Long 20ft control range will get dog's attention anywhere anytime! No more annoyance! Sounds can only be heard by dogs- Not audiable to humans. Sit on your couch and make neighbours dog stop barking. [Tired of the excessive dog barking ] Stop bad habits now with our ultrasonic no barking device. Sound from anti-barking device is a sign of no-no for your pet dog. An excellent way to stop your doggy from barking, chewing, digging, fighting, jumping, begging and biting.