Features: Anti barking dog collar, pet training and bark stop device, with 3 training modes. With excellent wear resistance, adjustable buckles, and full of durability. Suitable for dogs with a neck circumference between 8 inches and 25 inches, not suitable for dogs weighing 11-110 pounds. IP67 waterproof rating ensures safe use even in water. Easy to install and convenient to use. Specifications: Host Material: Plastic Size: approx. 73x2cm/28.74x0.79inch Working voltages: 3.7V Battery capacity: 450mAh rechargeable battery Charging time: approximately 1.5 hours Package Includes: 1 Piece Automatic Bark Stop Device with Rope & Accessories 1 Piece Charging Cable 4 Piece Probes (2 long+2 short) note: 1. When using in not quiet environment, please reduce the sensitivity of the device. 2. It is not recommended to use this product when dogs in excited state while playing. 3. This product is suitable for dogs over 6 months old, weighing no less than 8 pounds, healthy and not aggressive. 4. Please use charging device with output voltages of 5V for charging.