Check the listing for details. Anti-Dog Barking Device Ultrasonic Bark Deterrent Silencer Training-Bark. Condition: New. Listed at 18.99 USD. Features:Three Modes, Wider Applicability - It will be more effective regardless of the breed, age and size of the dog. Because it has 3 different modes covering different frequency ranges, there is always one that suits your dog.No Fight,No Bark - After training, it can make your dog become obedient, stop barking, fighting, and chewing furniture.Visual Training, More Effective - Combined with auditory training, visual training through yellow light makes training more effective and dogs more obedient.100% Safe - Studies have shown that certain frequencies of ultrasound and yellow light are 100% safe for both humans and dogs. Please use it at ease.Repel Unfriendly Dogs - If you encounter an unfamiliar and unfriendly dog, you can use it to repel and protect yourself and your family.Specification:Color: BlackConnector Type: USB Type CBattery Capacity: 24000 mAhPackage included:1 x Anti Barking Device