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 x 11 x 6cmItem weight: 195g Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store