SPECIFICATIONSBrand Name: VKTECHItem Type: RepellentsOrigin: Mainland ChinaIs Smart Device: no Dog Bark Stopper Deterrents Ultrasonic Pet Repeller Trumpet Outdoor Anti Noise Anti Barking Suppressor Puppy Training DeviceFeature:1. Ultrasonic anti-bark device can automatically detect dog barking from 50 feet away. The barking control device will automatically make a high sound that only dogs can hear. After the dog stops barking, the ultrasonic barking control will automatically stop emitting ultrasound.2. Ultrasound is harmless to pets and