1.Uses ultrasonic sound to deter unwanted barking 2.Detects barks up to 50 feet with the use of an internal microphone3.Levels of operation including a test mode 4.Chargeable,Durable and weatherproof for outdoor use Possible Uses for the Outdoor Bark Control-Stop your barking dog5.Stop your neighbors barking dog6.Train puppies not to bark7.Deter barking dogs on camping tripsCaution: 1.Humans cannot hear the ultrasonicsound, however precautions should be taken when preparing the Outdoor Bark Control for use.2.Keep an arms length away from the human ear to avoid hearing damage if a dog begins barking while you are setting up, mounting or hanging the Outdoor Bark Control.3.Humans should also avoid standing very close to the Outdoor Bark Control when it is on.4.Not for use by children.