Wide Coverage:This product uses dual-channel super-driven dog, double-headed dog, laser drive snake, drive cat, lighting function in one of the super-acoustic drive.Emits piercing ultrasonic tone that dogs hate and make dogs away from people. IMPROVE THE EFFICIENCY OF TRAINING DOG:The ultrasonic anti barking device combines dog training and bark control. The ultrasonic anti barking device can effectively trains your dogs to stop unwanted behaviors, barking, digging, eat something dirty or fight. SAFE AND HUMANE:Pet gentle ultrasonic handheld uses physical methods to stimulate dogs and has no effect on dogs health,thus being the most humane way to protect yourself from aggressive dogs.It can also be used as dog training device. Battery: You need to bring your own 9V battery,Package include: 1 x Ultrasonic Dog Trainer, 1 x User Manual, not including battery. Due to reasons such as shooting, display and light, product pictures may have different degrees of slight color difference on different monitors Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.