High quality, wide coverage: This product adopts dual-channel ultra-drive dog, double-headed dog, laser snake drive, cat drive, lighting functions in one of the ultrasonic drives. Makes harsh ultrasonic tones that dogs hate to keep dogs away from people.Increase Efficiency in Training Dogs: The ultrasonic anti-bark device combines dog training and barking control. The ultrasonic bark guard can effectively train your dog to stop bad behavior, barking, digging, eating dirt or fighting. SAFE & HUMANIZED:The Pet Gentle Ultrasonic Handheld device uses physical methods to stimulate the dog and has no effect on the dog's health, so it is the most humane way to protect yourself from aggressive dogs. It can also be used as a dog training device. Batteries:You will need to bring your own 9V battery (batteries not included) Package includes: 1 x Ultrasonic Dog Trainer , Shipment Quantity: 1 piece Package Contents: Only the above package content, other products are not included. Size: 14*6*3cm (Reminder: The size is measured manually, please allow 1-2cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.) Products from GuanGuan's store