4 in 1 Barking Control Multi-Function Mode The ultrasonic dog barking control device combines 2 times ultrasonic waves and a flashlight in one device, with built-in fixed 25KHz and variable 15-30KHz frequencies to prevent excessive barking, chewing and digging, and can replace traditional electric shock collars, which is safe and harmless to dogs. Suitable for indoor, park, camping, picnic and other scenes

2X Ultrasonic Transmitters and Humanized Design The bark stopper uses upgraded dual-head ultrasonic frequency technology to enhance ultrasonic coverage and quickly stop your dog's barking. It doesn't cause physical pain or discomfort like electric shock collars, making it safer. It can effectively train your dog to stop barking and prevent neighboring dogs or large dogs from barking without causing harm.

50-foot Barking Distance, Compact and Portable The anti-barking device is compact and can be easily put into your pocket or bag when you go out. Whether you want to quickly correct bad behavior or do daily obedience training indoors and outdoors in gardens and lawns, the anti-barking deterrent emits ultrasonic waves within 50 feet to quickly stop your dog from barking.