Dog Training & Behavior Aids :Our anti bark device for dogs outdoor have an excellent effect on stopping dog barking. The ultrasound emitted by the barking control devices will correct the dogs bad behavior. For Example, dog biting sofa digging excessive barking. When using the indoor anti barking device for the first time, each dog has a different sensitivity to the anti barking device, so please allow up to 2 weeks for training. Anti Barking Device with 4 Modes :The anti barking device has 4 adjustable ultrasonic levels, please turn the anti barking device knob to test different frequency bands to get the best effect. This barking control device comes with a well-designed aviary post to stop any dog barking (within range); five action buttons dog barking deterrent device including a test button, a close button, and three-level buttons. Safe & Effective :This dog barking deterrent devices is safe for small, medium, and large dogs. Anti barking devices outdoors make a harmless but effective sound to control excessive barking. Humanized barking control devices is harmless to humans and dogs. Train your dog in a professional way to stop dog barking and develop good behaviors. Durable & Weatherproof :Our barking control devices easily hang on trees, walls, or fence posts. You can also put a stop dog barking device next to the garden or kennel, Our anti barking device can work even on windy and rainy days. But it is best not to let the battery compartment at the bottom of the anti barking device soak in water, otherwise, it will damage the dog barking control devices. Wide Range :When the ultrasonic dog barking control device is turned on, the outdoor anti barking control can detect barking within 15, 30, and 50 feet respectively and automatically activate a dog barking control devices emit ultrasonic waves to stop dog from barking.