General description This ultrasonic anti-barking device is designed to help control excessive barking in dogs by emitting a frequency sound that is audible only to them. It is pet-friendly and harmless to dogs' hearing, making it an ideal solution for dog lovers seeking a quieter environment. The device effectively curbs unwanted behaviors such as barking, digging, and fighting. Technical specifications Adjustable frequency levels: 15-30KHz for large dogs, 20KHz for medium dogs, 30KHz for small dogs Control range: 33 feet (10 meters) Battery: 3.7V 1500mAh rechargeable USB battery Battery life: Up to 30 days on a single charge Installation Includes 1 charging cable, 1 dog training whistle, and 2 screws for easy installation Can be hung on trees, walls, or fence posts Optimal placement: More than 1.5 meters indoors for increased effectiveness Usage Adjust frequency weekly to maintain training effectiveness Indicator lights: Blue when operational, red when triggered by barking or low