Ultrasonic Pet Anti-Barking Device Dog Bark Control Stop Repeller Silencer Training ToolFeature:Pet friendly anti-barking device: this ultrasonic barking control device works by sending a stable frequency sound that only dogs can hear, preventing dogs from barking and calming dogs. No irritating smell, no electric shock, anti-barking for dogs that only work when dogs bark. Bark repellent device is harmless to the hearing of people and dogs, perfect to create a quiet department for dog lovers and stop unwanted behaviour.Effective for dogs of all sizes: the ultrasonic dog barking repellent with 3 adjustable sensitivity and frequency levels (15-30 kHz for large, naughty dogs); 20 kHz for educational dogs; 30 kHz for small dogs) prevent dogs of different sizes from barking easily. Adjusting the frequency for each week can maintain the training effect. Easy to use: this rechargeable dog bark control device with LED indicator can be used effortlessly. When you work on 3 different levels, the light flashes blue every 6 seconds; red light stays on for 3 seconds when the sound barking is triggered; the red light flashes at low power.Outdoor and indoor use: the human bark devices with IPX4 rain protection function and the portable hook can be easily hung up trees, walls or fence posts. But when heavy rains, its best to bring it back to extend its lifespan. The ultrasonic dog device can be placed on a desk, wall and shelf with a height of more than 1.5 m, which can be adjusted more effectively for barking, digging, fighting, etc.Material:ABSPackage included: 1 * Anti-Bark Device Control2* Mounting Screws and Anchors1* USB Charging Cable1* User Manual Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!