【Stops Bad Behavior，It Really Works】 Not just an anti barking device for dogs indoor or outdoor. Our dog training tools can quickly stop bad dog behaviors, such as barking, digging, chewing, jumping, biting, chasing. The advanced Ultrasonic Bark Control Device with the dual emitters can emit a wide range of sound waves from 20-30khz, which has no effect on humans but is sensitive to dogs. 【Super Easy to Use】 Tired of endless barking and unruly behavior? Say hello to the 3.6x more effective Clasy Ultrasonic Dog Bark Deterrent Device! With just one purchase, you'll get 3 incredible tools in 1: a dog bark collar, a dog whistle, and a dog clicker for training. Simply point the device at the dog within 35ft, press the button, and watch the magic happen. For best results, use it with your commands like Sit! Come! and Quiet! 【3 Training Modes for Any Solutions】 Our barks no more dog training device offers not 1, not 2, but 3 magical training modes to suit your needs. Whether it's daily training or deterring unwanted behavior, we've got you covered. Incorporates 10s auto shut-off technology to protect the hearing safety of all breeds and sizes of dogs. Dog-friendly and 100% Safe.