Ultrasonic Dog Bark Stopper Anti-Bark Control Device 2 In 1 Dog Training Aid Instruct The Dog To Walk Safely Outdoors  Ultrasonic Bark Stopper-This handheld bark stopper is the latest dog repellent. Using the ultrasonic bark control device, it emits a frequency of 25KHZ, which cannot be heard by dogs and family members. 16.4 feet effective range control-This barking-free device has ultrasonics, up to 16.4 feet (5 meters), which is very suitable for indoor or outdoor dog training, such as walking, jogging, picnic, biking, and even you can use it to stop The neighbor's dog barks. In addition, it can protect the dog from aggressiveness during outdoor sports. easy to carry, no matter where you go, you can use a rope to hang on your hand. Powered by 4 AAA alkaline batteries, one button operation, so that everyone can train the dog professionally. It is better to use it with other pet training tools, such as dog training collars or bark collars. Improve bad behaviors-Healthy and humane dog training equipment not only prevents dogs from barking, but also guides their uncivilized behaviors, such as jumping, digging, chasing, biting, eating unsafe food, fighting and excessive barking. Suitable for dogs of all sizes from 6 months to 8 years old. colour:black material:ABS size:4.2x3.3x9.5cm Package Contents: 1*Dog bark stopper Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.