Features:High-Quality Material: The handheld ultrasonic bark stopper is made of high-quality material, which is wear-resistant and sturdy and not easy to break.Portable Design: The dogs repeller is compact and handheld, easy to carry and use immediately when walking, jogging or hiking to prevent dog attacks when out and about.Ultrasonic technology: emits high-frequency sound waves that are unpleasant to dogs (inaudible to human ears), preventings them from approaching or showing aggressive behavior.Lighting: Designed with luminous lights to improve visibility when walking at night or in low light conditions.EASY TO USE: The handheld dog repeller is simple to operate and requires just a button to activate, making it suitable for all ages and experience levels.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Material: ABSSize: 13*2.5*5cmBattery specifications: 9V batteryDog repelling is not effective in the following situations:1. The dogs you keep because it knows that the owners will not hurt it;2. Noisy environments, such as downtowns areas or roadsides;3. Dogs that stay with their owners - dogs rely on human power; traineds large dogs - well-trained;2. When the battery voltage is too low - the transmitting power is low.The above situation will not affect the effectiveness of this product, because dogs at home, dogs that often go shopping, dogs with their owners, and well-trained dogs will not bite people;Note: It is best not to deliberately tease the dogswith a dog repellent, because it will be no surprise if the dogshears it too much. When the dogsrepellent light is obviously dim, replace the battery in time.