Features: Advanced Ultrasonic Technology: Uses high-frequency sound waves to safely deter barking, aggression, and animal attacks without physical contact. Portable & Lightweight Design: Compact and easy to carry (110x30mm), suitable for indoor and outdoor pet training. Dual-Function Device: Operates as both a dog repeller and a pet training tool to improve obedience and prevent unwanted behavior. Safe & Humane Training: Non-harmful ultrasonic sound ensures stress-free training for pets while maintaining a peaceful environment. Ideal for Pet Owners & Trainers: Designed for dog trainers, pet owners, and outdoor enthusiasts seeking an effective solution for barking and behavior control. Notice: 1. Actual color may vary slightly from the image due to different lighting conditions. 2. Please allow 1-3 cm deviation due to manual measurement. Battery capacity: 800 mAh Working hours: 90 days Charging time: 0.5 hours Rated frequency: 15–40 kHz Rated power: < 3W Rated power supply: DC 5V