General description This 50 Feet Effective Outdoor Dog Anti Barking Device is designed to help control excessive barking in dogs using high-frequency sound. Suitable for dogs aged 6 months and older, it operates effectively within a range of up to 15 meters (50 feet). This device is safe for most types of dogs and does not require a traditional collar, making it a convenient option for outdoor use. Technical specifications Effective range: Up to 15 meters (50 feet) Adjustable working frequency: 0 to 9 Voice recognition intelligent system: Filters dog bark frequency Durable and waterproof design for all weather conditions Usage Place the device on a tree, indoor wall, or fence to deter barking Utilize the three control buttons: stop button, auto button, and three level buttons for frequency adjustment Adjust ultrasonic levels manually or use the intelligent mode for automatic frequency adjustment Other information LCD display to monitor device operation and battery status Designed to