Outdoor Pet DOG Repeller Ultrasonic Bark Control Waterproof Rechargeable Dog Behavior Training device with 3 Adjustable Modes 2021 New Version — Anti bark device uses the latest ultrasonic technology which is suitable for dogs of all breeds and all sizes. The barking control device automatically emits high-pitched sounds that only dogs can hear. Once the dog stops barking, the ultrasonic bark control automatically stops emitting ultrasonic sounds. Safe For Dogs And People It emits the high-frequency ultrasound to makes the dog uncomfortable and stops barking instead of hurting them, no effect for dog health. It provides a safe and effective training tool that your dog or your neighbor's dog can use to stop barking. Suitable for most dogs in this range. ????4 modes: The ultrasonic Bark Control device for outdoor use has 3 adjustable ultrasonic range levels and a test mode: low range, medium range, high range, test mode (to check the function of the microphone and loudspeaker) Easy to install The hook design makes the device easy to hang on the tree, wall, fence post, or feel free to put on the table. Turn on it and it will begin to anti barking. Brings serenity to your family and your neighbors, at the same time, add some scenery to your outdoor decor. Durable Power & Waterproof The hook design makes the device easy to hang on the tree, wall, fence post, or feel free to put on the table. Turn on it and it will begin to anti barking. Brings serenity to your family and your neighbors, at the same time, add some scenery to your outdoor decor. Latest upgrade: The new dog bark controller uses a carefully designed mini shape that is easy to place and hide. The two-color display shows whether the power is full. Warm Tips The dog deterrent device is not applicable to the following situations: aggressive dogs, noisy surroundings, hearing impaired dogs, more dogs together, dogs under 6 months or over 8. Packing list: 1 x Anti-bark device 1 x USB cable 1 x Instruction book