General description Based on the theory that the Ultrasonic Dogs 3 in 1 Portable Anti Bark Dog Trainer Device can effectively train your dogs to be obedient and discourage unwanted behaviors such as barking, digging, and chewing. This device is useful for both humans and harmless to pets, as the sound can only be heard by animals. It features a super bright LED flashlight, which is beneficial for walking or jogging at night and also serves as a battery indicator. This 3-in-1 anti-bark device not only acts as a pet training tool but also provides protection from dog attacks. It is suitable for training various types of dogs and is ideal for outdoor work, travel, and security night patrols. The ergonomic design makes it portable and practical, allowing for easy transport during activities like jogging, hiking, cycling, or parking.