1.Uses ultrasonic sound to deter unwanted barking 2.Detects barks up to 50 feet with the use of an internal microphone 3.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 dog 5.Stop your neighbors barking dog 6.Train puppies not to bark 7.Deter barking dogs on camping trips Caution: 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.