Whether it's: ✅ Training for first-time pet owners — helping puppies establish the conditioned reflex that “quiet = reward”; ✅ Over-excitement during yard/balcony playtime — stopping dangerous behaviors like lunging at people or chasing birds; ✅ Public spaces during daily walks — preventing excessive reactions to passersby or other animals; Suitable for most healthy dogs, safeguarding every ounce of trust with science. We understand that every dog is unique. This bark control device has been rigorously tested and proven effective for healthy dogs aged 6 months to 8 years with no hearing impairments. It helps them establish behavioral boundaries faster, reducing the risk of abandonment due to behavioral issues. Important Note: If your dog has a known neurological condition such as epilepsy or seizures, or exhibits unusual sensitivity to ultrasonic frequencies, consult a professional veterinarian before use. Say goodbye to bulky, harmful devices—make training more compassionate. No complicated buttons—one-touch activation. Compact design for easy portability, perfect for walks or home use. Low-battery alerts ensure it never fails when you need it most. It's not a “punishment tool,” but your furry friend's “behavioral mentor”—using scientific sound waves to transmit “calm” signals, helping them learn to coexist gently with the world through non-harmful methods. Give your furry friend more understanding, give your life less noise. Notes: Please full charge the battery before the first use. The power adapter is not included, required 5V/2A. Specification Power Mode: built-in rechargeable battery USB Interface: Type-C(cable included) Packing Included Dog Bark Deterrent Device Hand Lanyard Manual