Nest Automatic Ultrasonic Deterrent Adjustable Review

【EFFECTIVE DOG BARK CONTROL DEVICE】Durable pet gentle bark control, dog training and barking deterrent: Adopts 2020 upgraded tech, this automatic ultrasonic outdoor bark control deter your own dog or your neighbour's dog from barking. More effective than old version deterrents. 【SAFE TO YOU & YOUR DOG】Trusted by dog trainer & veterinarians. Nest 9 barking control device emits ultrasonic sound from 15-30KHZ, which is much more safer than other devices to both you and your dogs, since average human hearing frequency range is 20HZ~20KHZ, and the dog can hear a wider range from 15HZ to 120KHZ; No electric shock, no liquid propellant is used, most humane and used widely way to bring you a pleasant life. 【FOR DOGS OF ANY SIZE】Nest 9 barking control device automatically emits safe sonic sounds that dogs can hear clearly but not hurt dogs and humans'ear.Suitable for most breeds and sizes of dogs, except dogs with hearing problems or under 6 months. Ultrasonic anti-barking devices automatically detect barking from as far away as 50 feet. 【EASY TO USE】The New Bark Controller come with a well-designed mini shape. Designed for easy hanging/mounting on a tree, wall or fence post to stop any dogs barking (within 50 feet range). Nest 9 dog bark deterrent has a power indicator. When you leave, it can be set to "Off" to protect the battery. 【WARRANTY & PACKAGING CONTENTS】1x Nest 9 anti barking device, 1x USB charging cable, 2x screw, 2x plastic expansion plug, 1x user manual. Notes:We do not recommend it for use on dogs under 6 months and over 8 years old.We are confident with 24 month warranty. And if you have any questions, please contact us. We will give you a satisfactory answer within 24 hours.