My dog used to bark at night when a neighbor's husky started crying, I bought this collar so I dont have troubles with my other neighbors, I didnt have to use shock mode, I just enabled the sound on 3 and the vibration on 3 also (for medium dogs as the instructions suggested), at first my dog got distracted with the sound, and tried to find where it came from, after some vibrations and barks he understood that he is not supposed to bark at other dogs, now I can sleep at night without waking up because of my dog.