Product name: Black Handheld Bark Control Luminous Ultrasonic Dog Repeller,Upgrade Anti Barking Devices,Dog Bark Deterrent Device Bark Box Sonic Barking Deterrent Devices Product size: 13*2.5*5cm/5.11*0.98*1.96inch Product color: As shown in the figure Product material: Plastic Product features: 1,The dimension of black handheld bark control luminous ultrasonic dog repeller is 13*2.5*5cm/5.11*0.98*1.96inch,This size is convenient for your daily use. 2.Ultrasonic dog repellents can emit high-frequency sound waves that can be heard by dogs, but not by people. This harmless anti-barking device helps give you peace of mind without causing any harm to the animal! 3.This ultrasonic bark repeller can not only train your dog, you can also carry it around to repel him. The combination of high-frequency flash and ultrasonic waves enhances the deterrent effect, especially at night or in dimly lit environments. 4.Whether you are encountering an aggressive dog during an outdoor activity, in order to protect yourself or your family, this multifunctional device provides you with a practical solution to help you repel aggressive dogs to improve your personal safety. 5.You will receive 1pcs black handheld bark control luminous ultrasonic dog repeller ,The Ultrasonic Dog Repeller has an effective range of up to 82 feet to deter unfriendly dogs. Portable design makes this bark deterrent suitable for indoor or outdoor use. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1 pcs black handheld bark control luminous ultrasonic dog repeller