Reddit reviews Zelers Sonic Bark Deterrents Ultrasonic Bark Control Device Anti Barking Device Dog Training Dog Outdoor Ultrasonic Level Control Safe for Small Medium Large Dogs Bark Control Device (A3)

【INTELLIGENT, UPGRADE】: FOR DOGS OF ANY SIZE - uses high-frequency sound that works to reduce excessive bark of dogs within hearing range; for dogs 6 months and older UP TO 25 FOOT RANGE.【 HUMANE, HARMLESS】:100% safe, humane and professional way to train your dog to stop barking.【PROTECTION,EFFECTIVE】:Designed for easy hanging or mounting on a tree,wall or fence post to keep your own dog or your neighbors dog from barking.【ECONOMICS,AFFORDABLE】:Contain sensitive microphone isolates and picks up barking up to 50 feet away to stop barking both outdoors and indoors (recommended starting mode for indoors is level 1, increase if needed). NOTE: Does not work on deaf or hearing impaired dogs.【LATEST UPGRADES】:Like an alarm clock, small and easy to place and hide, Two LED battery status indicator, four adjustable ultrasonic volume levels-test low range, medium range, and high range.