1.EFFECTIVE DOG TRAINER Dog bark cap for indoor and outdoor use frequency sound waves, this harmless antiboarding device is safe, effective and imperceptible to the dog, ensuring a peaceful environment without harming animals. 2.MULTIPURPOSE TRAINING DEVICE: Automatic cutting dog barking device of this powerful dual ultrasonic device, designed to train your beloved pets and effectively repel hostile dogs, especially in low light or night environments, with a frequency light that improves its effectiveness, reaching up to 82 feet. 3.LONG LASTING TRAINING The automatic stop dog barking device allows for hassle control over your dog's barking with our compact and lightweight device that has up to 60 days of battery life. Designed for easy carrying and intuitive use, it's your outdoor training tool. 4.Behavioral Companions: Ultrasonic antibarking device that, with the push of a button, emits ultrasonic waves and bright LEDs to deter barking and correct behavior. It also works as an LED flashlight to light up the path at home and ensure safe walks.