【Advanced Ultrasonic Technology】Our dog repellent device emits ultrasonic frequencies that are perceptible to dogs but barely audible to humans. Effectively stops nuisance barking and discourages aggressive behavior without causing harm to animals. 【3 Adjustable Frequency Settings】Customize the ultrasonic output with three precision-tuned frequencies. Choose the appropriate setting for different situations - from stopping excessive barking to training your pet or deterring approaching dogs. 【Multifunctional LED Flashlight】Features dual high-brightness LED lights for enhanced visibility during nighttime walks. The built-in torch provides added safety and convenience for evening outdoor activities. 【Long-Lasting Rechargeable Battery】Equipped with a powerful built-in battery that fully charges in just 2.5 hours. Enjoy up to 30 days of active use or 60 days standby time. Compact and lightweight design perfect for daily walks and outdoor adventures. 【Wide Application Scenarios】Ideal for both indoor and outdoor use. Effectively addresses neighborhood barking disturbances, park encounters, and daily training needs. Simple one-button operation ensures quick response in emergency situations. Perfect for dog owners, joggers, mail carriers, and outdoor enthusiasts seeking a humane and effective solution to manage unwanted dog behavior and ensure personal safety.