General description Safe Anti-Bark Device: The Ultrasonic Dog Bark Stop Device utilizes ultrasonic technology to gently deter excessive barking in dogs. It is specifically designed for dogs, emitting ultrasonic waves that are inaudible to humans and other pets, effectively surprising and annoying dogs to reduce barking. Technical specifications Effective range: 10m Frequencies: 3 adjustable modes Mode 1: 15 kHz (for large, active, excited dogs) Mode 2: 20 kHz (for calm and gentle dogs) Mode 3: 30 kHz (for sensitive and shy small dogs) Battery: Built-in 1500mAh rechargeable lithium battery Charging time: 5 hours Usage duration: Up to 30 days on a full charge Waterproof rating: IPX4 Dimensions: 83.8 cm Installation Can be mounted on walls or blackboards using the built-in mounting tool. Placement location should be considered for optimal effectiveness. Usage This automatic dog barking silencer detects barking and activates automatically, emitting ultrasonic waves to stop excessive