[NO MORE ANNOYING BARKING]This bark deterrents uses ultrasonic sound wave to effectively trains your dog to stop excessive, noisy barking. Suitable for all sizes and breeds of dogs.[3 LEVELS ULTRALSONIC & 50 FEET EFFECTIVE RANGE]With a built-in microphone and 3 levels ultralsonic intensity, which can detects dog barking from 50 feets away. Pleaes use the test mode to verify the microphone and speaker are working properly.[SAFE MATERIAL FOR HUMAN & PETS]We cannot hear the low-intensity ultrasonic sound wave, it only work for dogs, which is convenient and unharmful.You can enjoy a quiet night with this anti barking device.[Effective for most dogs]Suitable for dogs of all breeds and sizes, but not for dogs with hearing loss or hearing loss. Open the outdoor bark control only during unnecessary barking to prevent the dog from becoming desensitized.[LOVELY APPREARANCE]This birdhouse-shaped sonic bark deterrent can be mounting on a tree, wall or fence to keep your own dog or your neighbors dog from barking. Pls make sure the microphone is less than 5 feet high and is facing the direction of the barking dog.Material:ABScolour:blackPackage Contents:1 * Barking Device (Without battery)Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.