1. Intelligent Sensing, Effective Barking Relief: The K4 Automatic Barking Relief Device uses ultrasonic technology to accurately detect dog barking within 33 feet, emitting three-level variable frequency ultrasonic waves (15-30kHz, covering the 15kHz, 20kHz, and 30kHz bands) with an impact distance of up to 50 feet. It prevents dogs from adapting by cyclically switching frequencies, effectively stopping barking from your own dog, neighbors' dogs, or stray dogs. Suitable for both indoor and outdoor use.

2. All-Weather Protection, Durable Design: With an IPX4 waterproof rating and a high-quality ABS shell, it is corrosion-resistant, dustproof, and resistant to harsh weather conditions, operating stably even in rain and snow. Its compact body (12×6.5×9cm) is lightweight and easy to install, supporting desktop placement or wall/tree mounting, adapting to various usage scenarios.

3. Safe and Harmless, Pet-Friendly: The ultrasonic waves are designed only for dogs' hearing range, inaudible to humans, and have no irritating odor, risk of electric shock, or harmful effects. The device only triggers when barking is detected, operating quietly and creating a harmonious environment for families and pets.

4. Easy to use and long battery life. Ready to use right out of the box, supports USB charging (3.7V/1500mAh battery), and offers up to 30 days of continuous use on a full charge, eliminating the hassle of frequent battery changes. Its lightweight 0.19kg design balances functionality and portability, making it an ideal choice for pet-owning families and community management.