ELECTRONIC DOG TRAINING DEVICE: With a loud, humane noise, use the patented Doggie Don’t Device to stop dog barking and correct behavior, including fighting, jumping, biting, nipping, chewing, food stealing, scuffles, walking on leash, and reactivity. Best used on dogs 6 months-8 years old. If our device does not work for you, we will refund you within 30 days, no questions asked.