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), 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 & Humanes Training: Non-harmful ultrasonic sound ensures stress-free training for pets while maintaining a peaceful environment. Ideal for Pet Owners & Trainers: Suitable for dog trainers, pet owners, and outdoor enthusiasts looking for an effective anti-barking and behavior control device. &nbsp; Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement &nbsp; Description: Battery capacity: 800 mA Working hours: ≧90 days Charging time: 0.5 hours Rated frequency :15-40KHZ Rated Power: < 3W Rated power supplies :DC5V