4 Pack Vacuum Cleaner HEPA Filters for Cyclonic Series RO3753EA RO3731EA RO3786EA Features:<br> Advanced Ultrasonic Technology: Uses high-frequency sound waves to safely deter barking, aggression, and animal attacks without physical contact.<br> Portable & Lightweight Design Compact and easy to carry (110x30mm), perfect for indoor and outdoor pet training.<br> Dual-Function Device: Works as both a dog repeller and a pet training tool to enhance obedience and prevent unwanted behavior.<br> Safe & Humanes Training: Non-harmful ultrasonic sound ensures stress-free training for pets while maintaining a peaceful environment.<br> Ideal for Pet Owners & Trainers: Suitable for dog trainers, pet owners, and outdoor enthusiasts looking for an effective anti-barking and behavior control device.<br> Notice:<br> 1.Actual color may be slightly different from the image due to different light effect<br> 2.Please allow 1-3cm deviation due to manual measurement<br> Battery capacity: 800 mA<br> Working hours: 90 days<br> Charging time: 0.5 hours<br> Rated frequency :15-40KHZ<br> Rated Power: < 3W<br> Rated power supplies :DC5V<br> Package List:<br> 1x Anti Barking Device for Dogs