This ultrasonic bark collar is a humane, effective solution to stop excessive dog barking. With 6 working modes and 7 adjustable sensitivity levels, it delivers gentle correction via sound, vibration, and ultrasound (no shock required). Equipped with AFT anti-false trigger technology, it accurately identifies your dog's barking while ignoring environmental noise. The clear LED display shows real-time status, and Type-C fast charging ensures long-lasting use. Lightweight and comfortable, it fits small, medium, and large dogs for home and outdoor use.