Dog Training Control Pet Ultrasound Anti-barking Stop Bark Deterrents Features: -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, chewing, digging and more. -Wide application: for training various dogs, such as, dogs in -Police , Collie, Border Collie, dog, etc. -Easy to operate: first open the battery cover and then put 1 piece 9V battery (not included), the sound is to, finally turn on the and it can work well, also they can serve as a flashlight when necessary. -Multi-functions: except as a pet training tool, it also can you from dog attacks, suitable for outdoor work, travel and security night patrol. Product Name: Dog Repeller/Anti Barking Device Material: ABS Color: yellow / Black Size: 140x40x30mm / 5.51x1.57x1.18inch Powered by: 9V battery (not included) Package Included: 1x Dog