Description: 【Stop Device】: Stop Barking Device is suitable for indoor and outdoor use, it can effectively train your dog to stop and avoid your dog or your neighbor's dog from barking 【Automatic Bark Detection】: Smart detects barking instantly and emits ultrasonic pulses to correct behavior automatically, no manual intervention needed for continuous training 【Easy to Use】: The dog control device is easy to use for you. Uses advanced ultrasonic technology to gently discourage excessive barking without harming your pet 【Material】: The dog Stop Barking Device is made of ABS material, sturdy, ensuring durability and long term use, for easy handling during walks or at home. Size: 8 cmx4 cmx10.7 cm/3.15 inchx1.57 inchx4.21 inch 【Widely Used】: Dog training device behavior training tool is suitable for dog house, fence, home, yard, garden, indoor, and outdoor anywhere Size Chart: 8 cmx4 cmx10.7 cm/3.15 inchx1.57 inchx4.21 inch   Package Includes: 1 Stop Barking Device Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.