The "Automatic Bark Stopper" by Train Tai is a smart anti-bark dog collar designed for small dogs weighing 4lbs or more. It features three levels of vibration control and operates using vibration and sound methods. Made from ABS plastic, silicone, and a ribbon collar, this waterproof collar has an IP68 rating, making it suitable for outdoor use. The collar is equipped with a 300mAh rechargeable battery, a low battery indicator, and automatic anti-bark functionality to help train and manage your pet's barking behavior effectively.