Anti Bark Device, Small Portable Dog Bark Stop Device, Handheld Bark Free Tool, Anti Bark Device for Dog Training, Wide Control, Puppy Small Large Large Dog Bark Stopper Outdoor Indoor PORTABLE SIZE: Our anti-bark device is lightweight and small enough to fit in your pocket and has an effective range of up to 16.4 feet. It will be more convenient to use outdoors. 【1 Button Control】: The stop dog barking device is easy to use, you just need to press and hold the button, it will emit ultrasonic waves to attract the dog’s attention and make them stop barking or bad behavior. 【Safe and Harmless】: Our No Bark Tool uses 25HZ ultrasonic technology to stop dogs from barking and correct their bad behavior, which is harmless to pets and humans. 【LED BATTERY INDICATOR】: When the Ultrasonic Bark Anti-Bark is low on battery, the red LED will light up when the button is pressed. Then replace the new battery and it will work. Features: 1: Ultrasonic dog training, safe and effective; 2: White and