Discourages barking for all size dogs Issues gentle static correction when dog barks. Not triggered by other dogs’ barking 15 levels of static correction that automatically adjust to the best level for your dog, levels increase only if barking persists. No programming required Water resistant bark control collar with a nylon strap that is adjustable up to 28” and a low battery indicator that alerts you when the battery should be changed Built-in Safety Feature: If your dog barks 15 times or more within a 1 minute 20 second period, the bark collar will automatically shut off for 3 minutes For dogs 6 months and older weighing more than 8 pounds U.S. Customer Support available by phone at (888) 640-8840