【Latest Anti-Bark Collar】 Highly effective and safe no-shock design. Safely train your dog with 3 modes: beep, vibration (1-7 levels), and automatic protection. Ideal as an anti-bark collar. 【Smart Dual Sensor】 Detects barking at specific frequencies and decibels, preventing false triggers from other sounds or other dogs' barks. Perfect as a no-bark collar. 【Long-Lasting Rechargeable】 Approximately 20 days of use on a 2-hour charge. USB charging method, perfect for preventing excessive barking. 【Suitable for a Wide Range of Dog Breeds】 Fits neck sizes from 18-54cm and dogs weighing from 2kg-30kg. This dog barking control device can be used for medium to large dogs. 【Ultra-Lightweight and Comfortable】 With a lightweight design of only 53g, it won't burden your dog's neck. Excellent as a training collar.