Features: Advanced Ultrasonic Technology: Uses high-frequency sound waves to safely deter barking, aggression, and animal attacks without physical contact. Portable And Lightweight Design: Compact and easy to carry, perfect for indoor and outdoor pet training. Dual-Function Device: Works as both a dog repeller and a pet training tool to enhance obedience and prevent unwanted behavior. Safe And Humane Training: Non-harmful ultrasonic sound ensures stress-free training for pets while maintaining a peaceful environment. Ideal For Pet Owners And Trainers: Suitable for dog trainers, pet owners, and outdoor enthusiasts looking for an effective anti-barking and behavior control device. Notice: Actual color may be slightly different from the image due to different lighting. Please allow slight deviation due to manual measurement. Battery Capacity: 800 mA Working Hours: 90 days or more Charging Time: 0.5 hours Rated Frequency: 15-40KHZ Rated Power: Less than 3W Rated Power Supply: DC5V Package List: Anti Barking Device for Dogs