NEW MODEL!! outdoor bark controller. stop dog barking. PET LAUGH bark control battery-powered. easy to use. tested and trusted. 100% safe, humane and professional way to train your dog to stop barking Emits ultrasonic sound when activated by powerful and highly sensitive internal microphone capable of picking up barking 50 feet away to deter barking Suitable for all breeds of dogs (excluding deaf or hearing impaired dogs) Two LED battery status indicator, four adjustable ultrasonic volume levels- test, low range, medium range, and high range. Can be used indoors and outdoors. Easy to use with simple settings