4 Training Modes and 8 Sensitivity Levels: This dog collar features 4 training modes for training and deterring barking: beep, vibration, beep + vibration and beep + vibration + shock. The 8 sensitivity levels can be adjusted to adapt to different environments. Advanced Technology and Design: The collar includes an improved smart bark detection chip to prevent false triggers and avoid unnecessary punishment for your pet. Designed for medium-sized dogs, this stylish collar features a color display and a safety lock for easy use. Automatic Bark Control Collar: This bark-activated shock collar works 100% automatically. It detects every bark your dog makes and triggers the bark control function. Training your dog is extremely simple and convenient. To prevent over-stimulation, our bark collar for small dogs includes a safety mode in the stimulation settings. Type-C Charging with Long-Life Battery: This bark collar uses a Type-C charging cable to fully charge in 2 hours, providing up to 15 days of battery life. The large color LCD screen displays battery status and low-battery warnings for user convenience. Suitable for Most Breeds, With a 27-inch adjustable leash, this collar is suitable for small, medium and large dogs weighing 4.5-54 kg. Not suitable for miniature breeds. IP67 waterproof allows your dog to enjoy swimming, bathing or other outdoor activities. Smart Digital Display: Features a clear LED screen that shows remaining battery power, ensuring you know exactly when to charge it (no more sudden dead batteries). ️ Adjustable Sensitivity (Sensitivity): Multiple sensitivity levels (as indicated by the icons) to suit different barking volumes and environments. Customize it for your dog's specific needs. USB Rechargeable Design: Built-in rechargeable battery. Comes with a USB charging cable for convenient and eco-friendly recharging. Waterproof & Durable: Designed for both indoor and outdoor use, resistant to rain and splashes, making it perfect for active dogs. Safe & Humane Training: Uses sound and vibration modes (optional shock-free mode available for gentle training) to correct excessive barking without harming your pet. Comfortable Mesh Strap: Made of breathable, lightweight mesh material that fits snugly and comfortably around the neck without irritating the skin. Adjustable length for small, medium, and large dogs. Note： Please measure your dog's neck size before purchasing to ensure a proper fit. Avoid leaving the collar on the dog for more than 8 hours continuously to protect the skin. The sensitivity level should be set according to your dog's barking habits for the best effect. Start with a lower level and gradually increase if necessary. This product is designed for pet training and behavior correction. Please use it responsibly.