I had to purchase a second dog silencer, one close to the dog on automatic was not enough. The second I use with the remote to activate when the dogs keep barking to silence. I would be nice to have a setting to have silencer active for extended period of time, like 10 to 30 minutes to make the stubborn dogs get the message not to bark. Now the most effective way to get the dogs to stop barking when they won't stop, is the press the remote every 10 seconds for 5 to 15 minutes. The continuous activation make the dogs quite down for awhile.