Features1.3 Adjustable Modes and Safe for Dogs: The anti barking device adopts 3 modes: Low; frequency conversion prevents dogs from being immune to ultrasound; the ultrasonic bark control device is safe for dogs and only the dogs can hear ultrasound.2.Recording Technology and AI Recognition: anti barking device is updated with 2 new functions; Recording Technology could record and store your dogs baking, then AI Recognition could filter other irrelevant noises and identify the sample of barking, to achieve more accurate dog barking detecting.3.Long-distance Control Device: The anti barking control device has long-distance detection, dog barking control device could automatically detect dogs barking within 50 feet, then the bark control device will send a changeable ultrasonic wave to prevent dog barking.4.Easy to Use and install: The anti dog barking device is easy to use, just charge it and put it on the table or hanging on the wall, no need to control it by yourself; the anti barking device will automatically work as long as you plug it.5.Suitable for All Sized Dog: anti barking device is suitable for all sized dogs; you could put your anti-barking control device everywhere, but what you have to notice is that one dog barking device is only for one dog.Specification:Name: Automatic Indoor Bark Control DeviceCOLOR: grayItem size 16.4*11*6cmItem weight: 195g