Usage Tips: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.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurement Battery capacity: 800 mAWorking hours: 90 daysCharging time: 0.5 hoursRated frequency :15-40KHZRated Power: < 3WRated power supplies :DC5V