Ultrasonic- Anti-barking Repeller, Pet Dog, Training Equipment. Features: Ultrasonic Anti-barking Device Can Automatically Detect Dog Barks 50 Feet Away. The Barking Control Device Automatically Emits High Sounds That Only Dogs Can Hear. After the Dog Stops Barking, the Ultrasonic Barking Control Will Automatically Stop Emitting Ultrasound. Ultrasound is Harmless to Pets and Completely Inaudible to Human Ears, So the Device Can Be Used Safely It Can Be Hung on a Tree, Indoor, Outdoor Wall or Fence to Prevent Dog Barking (within Range). The Dog Training Device is Suitable for Dogs from 6 Months to 8 Years Old. Specifications: Item Type: Bark Deterrents Is Smart Device: No Material: Plastic Type: Dogs Name: Ultrasonic Dog Training Device Material: ABS + Electronic Components Color: Black Size: 11x8.5x4.9cm Weight: 190g Packing: Boxed Package List: Dog Training Device*1 USB Cable*1 Screw Pack*1 . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.