[2022 NEW UPGRADED] The built-in pickup can detect the dog's barking, and the barking control device will automatically emit ultrasonic waves that the dog can hear, effectively training your dog to stop excessive and noisy barking. After the dog stops barking, the ultrasonic barking control device automatically stops emitting ultrasonic waves. [HIGH QUALITY TEXTURE] The dog bark control shell UV resistance, not easy to fade. Can be easily hung on trees, indoor, outdoor walls or fences to stop any dog barking (Ultrasonic anti-bark device can automatically detect bark within 50 feet). And the shell is IP4 waterproof grade, can effectively resist external splash. But if it , it's best to take it back, which helps protect the equipment and extends its life. [SAFE SILENT POLLUTION] The mini bark control uses ultrasonic technology that allows humans to hear a slight sound but is not affected by the sound. When the sound starts, the dog will notice the sound and other family members or neighbors will not be worried about being affected.Ultrasound does not impose substantial penalties on the dog. [WIDE RANGE OF APPLICATION] The anti barking device ultrasonic has 4 frequencies to choose, Each dog could choose the suitable frequency (15KHZ-30KHZ), and if the dog was not sensitive to this by using for a long time, please change the different frequency better. The dog device is suitable for dogs between 6 months and 8 years of age, except for dogs with hearing impairments or under 6 months and special large dogs. [SENSITIVITY ADJUSTMENT] The barking control devices ultrasonic has a choice of 4 sensitivities.According to the use of the environment can be set up the best suitable gear, the induction distance can be , adjust the sensitivity to achieve.Level 1 is the least sensitive and level 4 is the most sensitive. Colour: black Material: plastic Size: 12.5CM x 9CM x 5CM Package Contents: 1 x Anti Barking Device Only the above package content, other products are not included. Note: Light 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.